The best mainstream recommendation is a used mint-condition Bryston 4B-ST, it is the best all-around amp out there in this price range (generally can get them for about $1400-1500), has virtually no risk of breaking, and is much better sonically than anything Levinson or Krell in the same price range. More esoteric and less powerful but somewhat more open and dynamic is the BAT VK-200 (about $1800-2000 used), which is vastly better than any Levinson or Krell anywhere near the price.
