For that size room, yes the 804 should do well. I agree, you don't know what the speakers sound like in your room and if you don't like them, well there ain't no goin back. I also agree, when I look at houses, in-walls are a minus. In ceilings for surrounds or zones is fine, but for main speakers - not for me. Plus, why would you want to buy something you like only to leave it there when you move?