Bill
I just got done doing a home trial of a Pass X-1 with my Audio Research 100.2 amp and Magnepan 1.6's. Compared to my Audio Research LS16, the Pass sounded great. Both pieces are extremely neutral, however the dynamics of the Pass was incredible. It threw a huge sound stage with lots of depth. Something I didn't think a SS preamp could do. The bass extension was also excellent. I don't think you would be disapointed. I posted a similar question in Audiogon and received a couple of favorable replys also. If you are looking for a place to purchase, my local dealer Audio Video Logic in Des Moines has them for $3199 (new). You can AVL on Audiogon, or at their website: audiovideologic.com. They are great people.
magnepanmike