Something in the Pass Labs lineup would work very well, depending on your power requirements. I love my Xa30.8. One review says that it competes with a highly regarded SET amp (can't remember the name offhand) that sells for over 20k, plus you get the firm low end punch that comes with SS. It's very conservatively rated at 30 watts. It's easily driving my Vandersteen Quatros. I bought mine used for just under 5k.
