Tube Pre suggestions for Mac Amp


I have a McIntosh power amplifier that I am running CD directly into. I wanted to know if any of you Gon'ers have had any experience using a tubed pre on a Mac solid state amp and what you found to be a synergistic match.
andyzspot
MC602 with a c2200 is my best combination to date. Any speaker seems to perform to its fullest especially the Magnepan 3.6R it makes one want to step up to the 20.1R.
Hey, I like the VTL amps you had listed, can you list them again? [email protected] or call me at 612 227 2787, thanks!
Lots of good suggestions so far. I've been using the Mac C2300 preamp with my MC352 (solid state) stereo amplifier. It's a nice combination, and the phono stage in the C2300 it flexible and has worked well for me. Tube rollers say that improvements can be had with better tubes in the C2300, but I've not yet tried this.