My room is about 23' x 16'. The HT-63's are on their way for friday, and I may get the HT-64's for the back surrounds. Currently my surrounds are spherex omnipolars, which do a very good job, but I want to complete the system with all acoustechs.
The a2 is sick. The sub is a monster and almost the size of 2 H100's. I have it directly behind the seating area because I have no other choice. It hits hard, low, and smoothly. Definitely the best sub i've ever heard so far, and right at the edge of my price range. It took about a month until it arrived.
The best addition you can add to the system is a pair of bass shakers attached to your seat/couch. It adds vibration and makes it feel like the sub is even more powerful than it is. It feels awesome during a gunfight/explosion.