Actually, Peter says tube rolling does not change the sound much on his gear. So not really an issue.
I know Boead has one of his pre's and just loves it. He is the one who turned me on to the McAlister gear in the first place.
The guy who I got the SE 44 from had one of his pre's as well and seemed to like it quite a bit.
If the pres are anything like the amps, and they should be, then they offer top shelf sound for reasonable dollars.
Rocket_Ronny