Could be you are just accustomed to bass heavy systems like so many car audio enthusists build. have you heard your present speakers with 2 channel amps in your present room? It could also be the room is sucking the life out of the music or your present speakers are too hard(low sensitivity) for the amp to drive to good levels as bass is the hardest to reproduce.

Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70