@flyfish77 Your room is a bit bigger than mine but I have 25-foot ceiling. Everyone told me that my speakers should not be too close to the front wall. I have them only 17 inches from the wall to the back of the speaker. The speaker has 12-inch woofers and lots of bass. I am not having any issues with fatigue or what seems like bad sound. My room is fairly naked with only some IKEA shelves for my kids toys. This room is not treated. It is the high ceiling and far away side boundaries that are saving the day.
You maybe able to put a lot of speakers into that space given what I observed in my room.
However, before I do anything with the speakers I would consider your gear before the speakers (your room is likely fine). I used to own the Matrix Mini i-3 Pro. It is the most versatile DAC I had owned but the sound quality is about a 7/10 in the scale of DACs I have bought. You can easily improve on that for low cost. The same on the Rotel amp.
Here is a 30-day home trial suggestion with your existing speakers. Get a PeachTree GAN1 and ideally a Sonore Optical or the much cheaper BluesNode package from PeachTree.
This is a very good sound. I have the GAN1 streamed with the fibre optic OpticalRendu. I also got mine modded by TweakAudio.com and it then was as good as $15k of gear I had in my office system. You void your warranty doing what I did but the cost was relatively low. The results are amazing.
A speaker is not going to make a weak source sound better. Even if you buy ’better’ speakers you are not feeding it a great signal.
BTW - I am comparing the GAN1 to a CODA @16 (currently own) and Benchmark AHB2 (maybe own again) amps.
BTW2 - I just saw you have subs. In that case, the BluesNode is what you would need to stream not the better OpticalRendu.