Speaker recommendation for Home Theater

So $15k just for all 5 speakers excluding electronics and a sub(s)? 

$15k budget for 5.1 setup just for all 5 speakers and a sub or does it include electronics and cables? 

@wanderingmoo 

B&W, KEF, Paradigm, Focal are all great for home theater.

As for an av processor, if you want to go with the Marantz would recommend to go with a used recently discontinued AV8802/AV8802A. It is a clear step up sonically from the AV7704/7705. Today a used AV8802 can be had for around $2k or less in used markets. Anthem AVM60 will be another great processor with its superior ARC2 room correction. 
If you don't need 4K pass through nor the latest 3D surround sound objects formats eg Dolby Atmos, DTS-X & Auro-3D then you should also consider other older and recently discontinued processors : a used discontinued Classe Sigma SSP (not the Mk2 version), a used discontinued Classe SSP 800, a used NAD M17 (not the v2), a used discontinued Krell Foundation (original version), a used discontinued or previous models from various Audio Control Maestro and Arcam processors that can be had today for around $2500 to $3k and less. 

As for multi-channel power amps I highly recommend the following : Rotel RMB-1585, a used & discontinued Parasound Halo A51, a used Classe Sigma Amp5, a used NAD M27. 

@wanderingmoo

If your budget is around $15k just for speakers and a sub (5.1 setup) without electronics and cables and since this system is strictly for HT or movies and TV shows and stuff I would recommend getting the following B&W new 700 S2 series speaker system :
* B&W 702 S2 front speakers retail for $4500/pair brand new.
* B&W HTM71 S2 center speaker retails for $1350 brand new.
* B&W 705 S2 standmount speakers for surrounds retail for $2500/pair without stands.
For a subwoofer I would get either the JL Audio or SVS and I would spend for around $2k ish for it.

As for electronics I would recommend getting AV separates : AV pre pro + multi-channel power amp. For a pre pro or AV processor I would look for a used discontinued Marantz AV8802 processor that can be had today for around $2k and less in used markets. The Marantz AV8802 is very popular processor and you should be able to find a used one pretty easily in used markets. The Marantz AV8802 performs spectacular for the money.

As for a five-channel power amp I highly recommend the Rotel RMB-1585 five-channel amp currently retails for $3k new. This is an excellent amplifier for the money. Very powerful very refined and musical sounding amplifier. The Rotel will pair really well with the B&W speakers. Rotel always mate well with B&W. They were voiced together and are meant to be paired together.

Or you can find a used Parasound Halo A51 five-channel power amp. This amp was recently discontinued and today can be had for around $2500 used. Its original MSRP was $4500 when it was in production when purchased brand new. This model was discontinued recently.
Overall the Parasound Halo A51 is actually a better amplifier than the Rotel RMB-1585 IMO but you can never go wrong with either one. The Rotel RMB-1585 will probably have better synergy with the B&W speakers.

Lastly, do not skimp on cables : speaker cables, analog audio interconnects (XLR or RCA), digital cables eg HDMI, USB, spdif (coax digital) or optical digital (Toslink), and power cables or power cords. All cables do make a difference sonically.

Totally agreed with audiotroy. 

@audiotroy 
Just wondering how is the Audio Control Maestro M9? Say in comparison to the Lyngdorf MP-50 or the McIntosh MX160 or the Classe SSP 800 aside from Classe limitations in supports for those 3D surround sounds eg Dolby Atmos, DTS-X & Auro 3D. 

Not to mention that electronics are very important too along with cables and acoustic. 

The Classe CT SSP/SSP 800 is spectacular. I owned the SSP 800, which is basically the same as the CT SSP, for almost 8 years until recently. Now I have the Lyngdorf MP-50 cause I want Dolby Atmos, DTS-X & Auro 3D and the Classe SSP 800 does not support these formats.
That's the main reason I sold the Classe SSP 800 and got the new Lyngdorf MP-50. 

Or instead of getting the Musical Fidelity M6Si integrated for your stereo needs and the Marantz AV8802/8805 HT processor for HT or surround sound movies, I would recommend the Classe Sigma SSP av preamp processor, which is optimized for stereo. If you don’t care about 4k pass through, HDR, Dolby Atmos, DTS-X & Auro-3D you should look for a used discontinued Classe Sigma SSP (early version that does not support the 4k HDR Dolby Atmos, etc) in used markets or some or few Classe dealers might still have it as a demo unit or left over stock. Today it can be had for around $2500 ish used. It originally retailed for $5k when purchased new. This model has been replaced by the Sigma SSP Mk2 version that supports 4k HDR Dolby Atmos etc and it retails for $6k new. They are basically the same preamp processor except the Mk2 version supports latest formats & codecs.

The Classe Sigma SSP’s stereo performance for stereo music playbacks are superb and its surround performance is also very good when set up properly but it lacks auto room correction and instead Classe provides a manual PEQ (Parametrix EQ) which requires proper tools and equipments and thorough knowledge on how to implement it correctly and properly for surrounds. Its stereo performance that stands out. The Sigma SSP sounded more like a high end stereo preamp than a HT processor. And the back panels of the Sigma SSP looks more like a stereo preamp/DAC processor than a HT processor. It has very limited and much fewer connections than all other HT processors. 

Classe originally designed the Sigma SSP as a stereo preamp processor but later on decided to add extra channels to make it as a surround processor. The front LR channels of the Sigma SSP is true differential design or fully balanced design internally all the way but the remaining channels are single ended design but very good single ended ones.
So for the front LR channels I suggest you use XLR balanced cables to connect to a power amp in order to fully optimize the stereo performance of the Sigma SSP. It is also DLNA equipped but its USB input sounded much better than its other digital inputs for streaming stereo music files.

And for the power amp you can get very good quality class AB amps to drive your speakers. I bet the Classe Sigma SSP, especially when using its USB DAC input for stereo digital music files, will outperform the Musical Fidelity M6Si preamp/DAC section.