Preamp for Pass Labs X-150.8

Looking for a good preamp to match with the Pass X-150.8 amp. Prefer new in the $2500-$4000 range, but will consider used in this range as well. More interested in tubes than SS. With or without a phono pre, as I already have a decent one but if a built-in is good can go that route as well.  Speakers are ATC SCM 19.

The new Rogues, Audible Illusions and Backert interest me. Would like to hear from owners of these units, but what else is out there?