So long as you like the sound of Conrad-Johnson preamps. I would expect it to sound very different than with the P5. Think warm and chocolatey, more intimate, less extension, and perhaps not as quiet as the P5.
I use a tube preamp with my W5 and Thiels too. Let us know how you like it.
I use a tube preamp with my W5 and Thiels too. Let us know how you like it.