Pretty good sized room, I think you mentioned a West wall twice, but I figured out you were talking about the East wall overlooking the downstairs.
I would say that would be a prett cool HT room. You may want to look at the VP150 for that sized room, and I would also recommend a sub. What are you plans for movie watching? Depending on your furniture arangement, the North or South walls would be awesome for a front projector to get a true movie experience.
Randy
M60's VP150 EP350 4-Qs8's
Denon 2805
Sanyo Z2 WideXGA projector
Toshiba P.S. DVD
Samsung HD OTA receiver
