Hey Elvick - here I am with my chainsaw. :) The old Mc tube amps - all of them including the reissued 275 - are incredible. I've owned both old Mc SS and Mc tube, and you now see what I ended up with: a MC240. The old Mc SS amps are not bad, just smooth and laid back. That has to be compatible with your system - otherwise they don't sound good. The tube amps are more detailed and have much better immediacy and pace but are pickier about the speakers they get mated to. So in the end, it still boils down to system synergy but in general, the Mc tube amps remain closer to neutrality than the old Mc SS amps in my experience.
Arthur
Arthur