I just recently got a pair of cbm-170's driven by an adcom gfa-535 60wpc for my dorm room, which I've been very pleased with. My friend's parents want a theater system (already have the TV) for their living room which they'd like to have up by the 2nd of november for a 50th anniversary party. The stated budget is 1500-1800 but I think that can be bumped slightly. The only problem is that their living room is enormous and opens up into the kitchen and a staircase. My order of magnitude calculations put it at over 6000 cu ft. I was looking at the ascend cmt-340's, CMT-340 center, htm-200 rears, and the hsu vtf-2, plus stands for the mains and wallmounts for the htm-200s for about $1740 shipped. I would need to I'll assume that these speakers will be able to fill the room given enough amplification though I'm not so sure about the subwoofer (ascend site recommends stf3 or vtf3 for over 3000cu ft). I can get about 60% off harmon kardon via my father's employee discount, so I thought that would be a good option for a receiver. How many total watts would make sense for a room of this size? The surrounds will be fairly close to the listener but the mains and center will be about 3x further away. Something else to consider is that these folks have tin ears. However, my film major friend does not, so I do have some obligation to him I suppose (this will be his weekend treat when he comes home). I was looking at the AVR 7300 (115wpc) and the AVR 635 (75wpc). Given the enormity of this room, I am doubting that that 75wpc would be sufficient, but I really don't know a whole lot about it. Are there any other harmon kardon receivers (or any receivers from other brands) that would make sense? I would like to stick with HK for budgetary reason but I'm open to anything.