I picked up a VK200 on the used market and prefer it to my Rowland Model 3 monos driving my current speakers - Martin Logan SL3s. The Rowlands (which I bought new twelve years ago) have a great mellow, very dimensional sound on stats which is good but the BAT solid state stuff is just AWESOME on electrostats. Anybody with stats really should try the BAT stuff. I haven't listened to the BAT tube amps but the VK 200 is so good in my system I'm considering shopping around for one of their preamps.
