Bought a used BAT VK-200 a month ago, and it makes the sweetest sound I've ever heard from my Bryston BP-25/B&W 802's. Very warm, yet incredible, tuneful midrange detail. Not the final word in high end brightness, but it sure sounds like music to me, not electronics. Very tube like, if that's what you want. Krell, Aragon, Clayton, ARC left me out in the harsh cold. BAT invites me in to listen comfortably for a while.
