ive never heard the all in one box, but i have heard the 990 pre/pro into both the 7125 amp and 2 of their mono blocks. they sounded very warm and full, really they blew me away for the price tag on them. keep in mind i am somewhat new to the world of audiophile playback, but i have heard enough to know these really rocked. also the 2 monoblocks were hooked to vr-2's, while the 7125 was hooked to a full paradigm HT setup with studio 100's up front. the bass management seamed to be very cool feature BTW. everything i heard was upsampled to 24/96 i believe.....