I would suggest you give the new Herron VTSP-3A(R02) a look. I've owned four preamps in as many years (Audio Research and Modwright) and the Herron is by a wide margin the most musically satisfying of the lot. It is incredibly well designed and extraordinarily musical. Seriously, I am blown away by this thing and I'm not generally prone to hyperbolic statements. I'm working on a longer "review" as a way of "venting" my enthusiasm and will post it shortly. Not sure what kind of impedance match it will make with your amps nor what the rest of your system is comprised of but in my view the Herron should be at top of shortlist contenders in this price range.
