Since you're running tubes (albeit, a hybrid), I'd suggest that you go with an all tube pre-amp. There are many to choose from, but you didn't mention a price range or if a used item would be considered. I'd look into Blue Circle, Melos, C-J, MFA, or even AI. You might want to check out www.Wright-Sound.com as well. The Moscode doesn't have have any unusual input demands, so any good quality pre-amp will work. Of course, your preferences will determine the "best" unit in your budget for your system. Good luck.
