Hi,
I am also thinking about the Pass XP-20 Preamp and wonder what you like most about it. I currently have the Pass XA100.5 mono blocks and the preamp I am currently using is the Jeff Rowland Capri. Feel free to take a look at my system and I would appreciate any thoughts you might have about the Pass Preamp. you can write me on my system page if you like. Thanks very much. Stephen