Great to hear you like the Minimax and that it is so much better than the Sonic Frontier. I guess you even had to give up the comfort of a volume control for the better sound?
I am also starting to tackle the amp problem with the Abby's. My Bottlehead S.E.X. amp should be built in a week, and I am planning to get a preamp (probably the Fi Y: soo much nicer looks than the Minimax) as soon as possible. I would love to try and keep different amps around for different sounds: On my list are a solid state Firstwatt F1 and on the SET side a Fi X. I just would love to keep some different amps around for different moods.
Anyway, curois to hear how you like the Minimax after some longer time....
Best wishes,
Rene