Trying to Decide on my next Purchase

As an M50.2 owner since January, I cannot recommend this product to any serious music listener. The excellent hardware features are more than negated by truly horrible software support. 

1) since the 2017 fall creator’s update, Windows 10 users have been unable to access the share folders on the M50.2 because the device uses the old Samba 1/CIFS file sharing protocol. This protocol is so insecure that every OS has simply disabled it...there is no patch. Re-enabling smb/CIFS in Windows 10 today doesn’t grant access to the share folders, you now have to enable insecure guest authentication in your registry (which is by default set to off for good reasons). 

Bottom line, this thing is currently useless for windows 10 users as a network sharing device.  Unless you’re ok with opening up security holes on your computer.

2) DSD support, promised since late 2017, was supposed to come by the 2017 holidays, then spring 2018, and we still don’t have it today. I can only assume this is due to a licensing issue with MQA.

3) HDTracks is no longer accessible as a service on the M50.2. It was, but changes on their end created problems with the M50.2 auto-download service.

It would be nice if NAD open sourced the software. If they did, I guarantee to you that these issues would have been resolved by now, but it is what it is. Of course, they’re clearly operating off of a Linux build (maybe even android?) and are probably required to release their source code by the GNU license, but I won’t hold my breath. 

@oldschool1948

Not sure if you have made a purchase or decided on something by now but if you haven’t, I highly recommend the Naim Uniti Nova all-in-one solution. It is a streamer/DAC/integrated amp in a single chassis. You can sell your NAD M12/M22 combo and just get this Naim Uniti Nova. It currently retails for $7500 new. The amplifier runs in class AB. It is a highly musical sounding unit and I’m pretty sure it will sound more musical than your NAD M12/M22 combo plus a streamer.
The sound is very refined smooth very musical punchy and lean slightly toward a warmer side of neutral but nothing like a tube warm. It has excellent musical and rhtymic drive with great and focus imaging.

The Naim Uniti Nova has a pair of XLR & RCA analog audio inputs so you can connect a CD player to it. It also has various digital inputs (USB, ethernet, spdif, optical digital). You can connect a CD transport via one of these digital inputs on the Naim. Naim makes excellent DAC & streamer.
The Nova comes equipped with built-in Tidal & Spotify streaming apps and is Roon ready.

I happen to own the Naim Uniti Nova in my bedroom setup paired with B&W 805 D3 standmount speakers. They make great combo IMO.

caphill, I purchased an Innuos Zenith MK2 and I’m quite happy with it. Having said that, I might have gone the Naim route if I read your email beforehand. A close friend of mine purchased a Naim Unity Star with some Focal speakers and the combo sounds really good.

I also upgraded my turntable to a Technics SL-1200G w/ Ortofon Quintet Black cart. I’m in vinyl heaven.

I still have the NAD gear, and I must say as it's broken-in along with the power cords and interconnects that I purchased, it sounds pretty good.  But, I do plan to replace the NAD gear with something else; I'm not yet sure what that might be.  I'm looking for a better pre-amp/amp or integrated amp match for my Tannoy 8 dcti speakers.  

avlee -  The excellent hardware features are more than negated by truly horrible software support

This is another reason why I'm ditching my NAD gear.  My experience has been that their support is non-existent.  For example, I needed to apply a firmware update to the M12's BluOS module that I purchased and installed.  You can easily download the software from their site, but there are NO instructions on how to install it.  And the install package has two files with no information on which one to use.

There was no way to get help from NAD.  After 4 or 5 emails with BluOS support I gave up because they were no help either.  I asked very specific questions and got vague answers, or references to the NAD site - which I already tried to use. 

I've been a computer geek since 1968, so I finally figured it out for myself. BluOS support said they'd update the documentation to provide step-by-step instruction about 6 months ago but have not, but did release another firmware update - with the same NO instructions.

@oldschool1948 

The Naim Uniti Star is a step down from the Uniti Nova. The Nova is by far better than the Star. The Nova is the top of line within the Uniti series. The Uniti series is Naim's entry level series. But the Star is very good for its price point. While the Nova isn't exactly cheap at $7500 but if you must go Naim analog integrated amp + Naim digital front end components you will end up spending a lot more than the Uniti Nova. The Naim separates (digital front end + analog linestage preamp + power amp) will cost you even way more but they are awesome. Naim makes very musical sounding gears but can be pricey. Depending on your budget later down the road or when it's time for you to upgrade, I highly recommend Naim separates. They might pair quite well with your Tannoy.