Pre-Amp for Parasound JC-1

Just ordered a pair of JC-1's and need a recommendation for a tube pre-amp . Particularly interested in performance differences between balanced and single ended operation.

These will be driving Wilson WP7 via Transparent Reference XL-SS. Source consists of AN CDT2 and Zanden 5000 Mk. III
Interconnects will also be Transparent Ref. XL-V.

If balanced operation is the way to go, it seriously limits the number of candidates. Thoughts/suggestions please.
Rcupka, you could do the big Lamm or the new BAT or you could get us to build you a preamp if you don't mind waiting a while.....Shoot me an email if this interests you......Regarding DC offset and tube units you really need to try it out at home as sometimes if the voltage bounces around it will cause the preamp to burp every now and then and shut down the amps momentarily.......
Hi Rcupka,
I'm having fantastic results with an Atma-Sphere MP-1. Truley a killer combo.

I second your recommendation of the Atma-Sphere preamp. I'm a dealer for the Parasound JC-1's as well as Atma-Sphere, and it's a sweet synergy.

The MP-1 is a very nice preamp with an ardent following. Although I haven't owned one, I know someone who replaced one with a Blowtorch and was overwhelmed with the improvement. He uses Parasound JC-1s as well. Alas, the Blowtorch is not a production item, as each unit is built to order and sold direct only. Few if any preamps can approach the performance.