It may be a little more than you are looking for, but take a look at the Jeff Rowland Concentra II. I'm not too sure what they are going for used, but I think you might like it. Also, from what I hear, Plinius MK 8200 is definitely a piece worth checking out. McIntosh makes a couple. The MA 6500 is in your price range, and the MA 6900 is a little more, but may be worth the price increase. The Mark Levinson 383 goes for about 4k used, but I can say it is one nice integrated.
Downsizing advice
I'm currently running an Air Tight ATC1, c-j Premiere 11A, pre power combo and I am considering downsizing due to financial reasons. That being said, I still want to have a great sounding stereo. Any recommendations on a great sounding integrated in the $2.5-3K range. Tube or solid state, it should be able to drive my Sonus Faber Grand Pianos. Suggestions welcome.