Tube Preamps under $1000 used

I haven't heard much from the crowd about CJ 10A. I mention this because on the used market they seem to be very reasonably priced. I'm sure there are better sounding amps but for 500-$600?

This is wonderful, thanks for the responses. I have seen Audible Illusions at the top of many lists and I've been leaning toward that manufacturer. Here are some on the facts; I'm especailly interested in a superior MM phono section. I've kept'd my records in good condition since I bought my first Kingston Trio album in `59 and in the `80's I bought a B&O which I still like. I'll be using this preamp with Hafler SS 150 w Transnova and Sonus Faber Concertinos. The Sonus Fabers were a really big improvement to my system and now I want to complete it nicely with some cables and good pre. I'm also interested in a system that will provide full musicality at the lowerer end of the volume control.