Ok, I'm going to get laughed at but you'll never know unless you try it. I know of someone that replaced his Pass XP-30 with a Linear Tube Audio MZ2-S designed by David Berning and says it's better. You will laugh because of the huge difference in price but it's the finest preamp I've ever heard.
Isn't Linear Tube Audio MZ2-S an integrated amp? What amp did he replaced besides Pass XP-30?
Pass XP 30 and. ... well.... um ...
Nothing really in a long time has been all that for me. When I last really got excited about a preamp it was a CJ premiere, and a Sonic Frontiers.
CJ too colored for my taste. I had Sonic Frontier SFL-1, SFL-2, Line 3 and Power 3. PCX upgraded Line 3
and Power 3
to the MAX, SE+. Best move ever made is SELLING the Sonic Frontiers, POS!
We all have our personal preferences, to each his own. OP, go listen and decide for yourself!