Someone is selling a pair of 3a deCapos with stands at $1K right now. If you can stretch to $1K, I believe that they'd be a fine choice, particularly given your taste in music. I used these speakers successfully with Cary 300B mono amps in a room just about the size of yours. The specs on these speakers don't indicate what a fine match they are for SET amps. There's a single cap hanging off the tweeter instead of a full blown x-over and, in practice, that appears to make all the difference in the world.
Marty
Marty