I think a lot depends on the type of films you watch. I watch films that are dialogue heavy, rather than being sound-effects driven. When the room was carpeted the sound was fine, but since replacing the flooring I find the clarity of the dialogue much improved (actually noticeable, rather than some reviewer's measure of improvement).
I understand perfectly what you are saying, as I did a lot of research before deciding on my design. I also reasoned that if the sound was affected by the hard flooring, then I could put rugs down. However, I found the dialogue so much clearer with the hard flooring, so the rugs haven't been necessary. As I say, I don't tend to watch films with loud music or sound effects, so boom, etc hasn't been an issue. I don't even use my subwoofer anymore.
The equipment I have at the moment is a Sony DTR-DB1080 amp/receiver (due to be replaced fairly soon), Kef 2005.2 (6 x eggs) speakers and a Panasonic AE-200 projector (4:3 & 16:9). I have it connected by component cable and is progressively scanned. This allows me to use a 91" (approx) screen, which looks good from the distance I view from.
The Onkyo stuff is getting some really good reviews and I planned on trialing some of their stuff when I upgrade my amp. I also agree with your view on the Kefs, they produce some cracking speakers. However, the Castle Trent's I have in my lounge are probably the best stereo speakers I've heard.
