Anyone running a tube preamp with a Pass XA25?

@geof3 How do you like the Rogue RP5 and Pass XA25 combo vs your Pass XP12 combo? Does the tube preamp improve on the Pass preamp in yoir system?
Asking cause I had the Rogue RP5 running into the Pass XA25 and I felt that my system sounded too lean; the midbass punch was missing. I swapped the Rogue RP5 for a Cary SLP98 and then the Cary SLP05 and both the Cary preamps added the missing warmth and midbass punch.

@poketacez I would add Cary SLP98 to your list. The combination of the Cary with some Svlvania 6SN7s and Pass XA25 sounds great. I much prefered it to the Rogue RP-5 with the Pass in my system. 

Used SLP98s can be easily found for less than 2k

That said, is there anything specific you are looking to improve in your system's  sound?