Tube pre-amp with SS Classe Amp

Depends on what your willing to spend, and if new or used. Used CAT preamps are pretty hard to beat, and can be had at the $2k range used, or thereabouts, Also, if you can find a used Sonic Frontiers Line 2 or better, they do very well also, and are aound $1200 range or more on the used market). The Audio Research LS22 i believe is also a pretty good piece for the money, and is also an older used hunt.
You may also give the much talked about Audible Illusions Mod 3A a shot, as it's a good preamp on it's own, yes, and around $1200 used or less. All these preamps are pretty much class A rated, or close. System dependancy always makes a difference, and you'll justhave to try with your gear! Good luck

Years ago I had that amp and preamp. You might consider a BAT vk3, 5, 30 etc. If your looking for a slight bit of warmth and more extended sweet highs...

Currently running an older Classe' DR-10 (125wpc) with a c-j 14LS/Mullards. Excellent combination. However, as always, you have to audition your prospective choice(s) in your system. Some combinations are more synergistic than others. Good luck.

Thank you for all your responses, I heard a lots of good things regarding BAT vk30, Sonic Frontier line 2, and CJ,but I am using XLR interconnect right now and don't want to change to RCA, I am looking for sweet sound non-fatigue listen for hours currently using CP-50 Classe pre-amp. Is SF L2, BAT Vk30 any better and in what way?
Also have anyone using the new Cary SPL-2002 tube pre-amp?

The Sonic Frontiers products due to the fact that they are DC coupled, low output impedence (for a tube product) and fully balanced are excellent companions to many solid state amplifiers sharing these design parameters (w/ corresponding low input impedences). The higher you go up in the line the more compatible these tube pre amps are to solid state amps. They are well built with nice convience features. How ever they tend to be more neutral and less euphonic than many other tube preamps in IMHO.