I have my 990 connected to two Parasound Halo JC-1 mono amps for the front and a Halo A51 for the rest.

Awesome sound is all I can say. My set-up includes:

Outlaw 990 (Pre/Pro)
Two Halo JC-1's (Mono Amps)
Halo A51 (5-channel Amp)
Two Bohlender-Graebener (BG) 520i (Front Speakers)
One BG 220i (Center Speaker)
Two BG X3 (Side Speakers)
Two NHT ? (In-Ceiling Rear Speakers)
HSU VTF-3 Mk 2 (Subwoofer)
Sony SCD-XA9000ES (SACD Player)
Denon DVD-2200 (Video Source)
Monster Cable AVS-2000 (Regulated Power Supply)
Monster Cable HTPS-7000 (AC Filter)
Sony 60" LCD Projection HD
JVC DVR-921 (HD DVR)
Various High End interconnects and speaker wires

I have a seperate analog set-up in another room that I enjuoy as well.