B&W Matrix 801 Series II

I had a pair that took me a couple of years to get the best out of them. I initially powered them with a 250w Bryston amp but it was not until I added another 250w Bryston that they really bloomed. I had the original stands but I found that they were much better when they are 18" - 24" off the floor. This is how a few studios that I know use them. I also used Acarian Black Orpheus bi wires that are excellent with these speakers. Now they will truly rock and you can close your eyes and it's as though the band is in front of you. They were never very good at low volumes (although not too bad with $5k worth of bryston amps) but the closer you get to concert levels the more impressive and realistic the sound.
Btw- there is a pair of Blk Orpheus cables for sale here on agon at a very reasonable price - these are tough to find (I have no idea who the seller is)

As my fellow CT resident Ct0517 has described his experience with this speaker I realized how good they really are.
With the room dimensions mentioned you should be able to let the 801's bloom with authority providing you are willing to put the horsepower to them. It gets a little tricky with the Kevlar mids which, in my experience also came to life with plenty of class a power. It was the tweeters that were the bugaboo for me.
Big as they are they are still monitors and they can become holographic if put on good sound anchor stands 18"-24" off your floor. Abbey Road Studios used them in this manor as well as many other studios.
I've gone to CES for the past 10 years and have heard the best of the best and the 801's will never be mistaken for MBL's but for $2k and proper power and set-up you will be in the conversation with 75% of speakers out there. I was forced to downsize to smaller Joseph Audio monitors which are really nice but I miss the big sound of the 801's.