I've been using a Denon AVR-2803 as my pre/pro connected to a Krell KAV-500 amp for some time now. In a little while, I'll be going straight separates, and I'm considering the 990. What will I be losing or gaining in terms of fidelity compared to the Rotel RSP-1068 or Adcom GTP-880? Your thoughts/experiences are more welcome.

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My System
Hitachi 51S700 Rear Proj TV
Denon DVD-2900 II DVD Player
Denon AVR-2803 Receiver (Pre/Pro)
Outlaw ICBM Bass Mgmt System
Krell KAV-500 5Ch Amplifier
SVS 20-39CS (Passive Sub)
Parasound HCA-2003 Amp (1ch used for sub)
Dish DVR-942 (HD/DVR Receiver)
Von Schweikert VR-2000 (L/R Spkrs)
Von Schweikert LCR-20 (Ctr Spkr)
PSB Century 400i (Rear Surr Spkrs)
Outlaw PCA Interconnects (Analog)
Analyst Plus Interconnects (Digital)
Monster M2.2 Speaker Cables