i hate to say this because i so looked forward to getting the 990/7125 combo, but, to this point i would only be able to say that the 990/7125 is slightly (if that) better than the hk avr300....
more "headroom" yes, sound quality only marginally better (to my chagrin). the 990 doesn't seem to have the warmth of the hk avr300... the depth is about the same.. i really do not get it..
equip.:
klipsch la scala in the front
the center and sides are polk audio
mid size velodyne sub woofer