Galante Rhapsody's are a superb match with my 8 watt SET amps (Disclaimer - I am currently selling my Galantes as my SET amps are going into storage for a while). I'd normally tell you to consider Klipsch K-Horns or LaScalas, but both are too big for your room. You could use vintage Cornwalls in that space for much less than $2K. I'd also highly recommend considering Silverline Sonatinas. You can get a used pair in your price range, and they'd likely be a great match with your 15amp SETs. You should also try to solicit answers specifically from those with your amps as that interface is critical. I have no experience with your amps - I'm using 8 watt 300B SET amps.
Marco
Marco