I think an Audio Refinement Complete would match your requirements quite well and they're reasonably easy to find used in the $500 range. I'm extremely happy with mine.
There are lots of reviews online:
http://www.audiorefinement.com/show04.htm
http://www.1388.com/recommendations/$5000(2)-eng/
http://www.soundstage.com/revequip/srajan01.htm
There are lots of reviews online:
http://www.audiorefinement.com/show04.htm
http://www.1388.com/recommendations/$5000(2)-eng/
http://www.soundstage.com/revequip/srajan01.htm