Pioneer SX 1050 Recommended Speakers

https://www.madisoundspeakerstore.com/3-way-speaker-kits/zaph%7Caudio-sb12.3-sb-acoustics-12-dual-midrange-3-way/

Here is a DIY kit that is ideal for the type of music that you listen to... Super sensitive.... a Solid 4 ohm load, I don't think the 1050 will have an issue with that... everything but cabinet is included.
Tim

Also Dayton audio has easy kits for first time builders (link on the bottom) If you are really up to it, you can build from scratch and save money!

There are instructions for proac response for example - google for them. You can build quality ones for a fraction of the msrp, and since you are an expert, you can make them look to your liking...

It's fun, but an involving project. If you get your feet wet and build one, you will save a lot of money in the long run no doubt...If I had your skill, I would attempt it in a second.

http://www.daytonaudio.com/index.php/loudspeaker-components/speaker-subwoofer-kits/speaker-kits.html/

Dmgrundy, Selah Audio may work for you.

Question, I am considering DIY speakers, I am an experienced woodworker with and making speaker cabinets is no problem. Any suggestions on DIY kits where I can make the cabinet but the kit provides all the hardware, preferably a tower.

I still say the L100 Century. Yes, vintage Pioneer is warm (which is why I loved Pioneer in the 70's), and still, unless you must have bookshelf speakers, I still say JBL. If floor space were not an issue, I would have said Rectilinear. Bookshelf? I kind of liked the EPI 100's.

How about a Snell E? Very solid speaker.

Vintage hi powered Pioneer receivers tend to be a bit overly warm and bass heavy...which is why I would recommend a modern mini monitor type since you have space constraints....all the vintage lushness associated with Pioneer with the speed, articulation, and resolution of todays technology...that being said...some Klipsch kg 4 or Polk Monitor sda series would be fun...good luck!

The JBL is a good recommendation... might look at ESS

JBL Century 100

What price range? What is a reasonably size? Give that information and you will get some responses!