I used a B60 for a while and now I use an older 2b-lp pro with an AES AE-3 tube preamp on Klipsch Chorus II's and used the same pre/power set-up on Fortes and Forte II's. The B60 sounded great but the AES-3 in front of the 2b-lp fleshes out the mids and fattens up the bass a little IMHO taking the sound up a notch. It is a system synergy thing.
Slightly off topic, I just got a pair of Vienna Acousitc Haydn's (original version) that are being driven by the B60. What a great combination!