My room dimensions will be 10.5' W x 7' H x approx 24' long. I've read up on Denon a bit, but I'll look into HK. If I remember from my limited reading on HK, it always seems that their watts output always seemed lower than Denons, Onkyos, etc. Does HK measure wattage output differently?

FYI, if going with the M80s in this size of a room is COMPLETE overkill, you can tell me.