I'll second the suggestion to look at a used Bryston 3B or 4B. Beautiful amps for the money, and built like tanks. Used in a lot of pro studios too, especialy the 4B.
A VERY close second to the Bryston would be to get a couple of Flying Mole DAD-M100 series mono block amps. These are extremely efficient amps, and fantastic for the money. They have rock solid power supplies as well, which really helps. These amps sound WAY better than they should for the kind of money you pay for them -- very clean and detailed, and I've heard them do a very nice job of driving even some very demanding, inefficient speakers. They'll stand up very well next to a lot of amps in the $2000 range.