I've been playing an Alembic F1-X through a QSC PLX2402 and, though it has a great smooth sound, the F1-X is lacking in the mid-grind area. My guitar guy (who I trust implicitely with my electronics) says he can rearrange some caps and retube the Alembic preamp to produce a lot more mid. I'm sure he can, but am reluctant to mod a classic. I've been thinking about an Ampeg preamp. I've played both the CL and the Pro at different times and through different cabs (And I don't have an easy place to A-B them). My problem is I liked them both. I'd like to hear any thoughts from folks with experience with these alternatives. BTW - I'm not in desperate need of the multi-band EQ on the Pro, as I have both good graphic and parametric EQs to use. Also, I should say, I have a greater need for vintage vibe than a terribly modern sound.