Might I recommend the Camelot Technologies Lancelot Pro. Michael Fremer did a piece on separate Phono Pre-amps a year or so ago and put this one on top of his enjoyment list, except for a couple in the stratosphere price range. I purchased mine from Audio Advisors (I think that is the company name) for about US$890 new. It has adjustable gain (will work great at the .5mV range), separate inputs for MM/MC and separate power supply. I ordered a different set of resistors from the factory and they were terrific to deal with. It is solid state, but the sound? Excellent. I really enjoy mine, so that's really the only comment I give to you. I have never seen one used, but that probably tells you something as well.
Hope this helps,
Rush
Hope this helps,
Rush