Hulskof,
I have both the Mcintosh MC402 and the MC275. The 402 is solid state and the 275 is tubed. They both exhibit a strong grasp on the Cremona M's. I also have the new Cremona M's in Graphite. Both of these amps seem to mate will with these speakers. The speakers are VERY musical and the Mac's seem to bring out this musicality. Although the two I listed above are very different, they both have the ability to bring out the best in those speakers. Don't hesitate to try the 275, it has a sound that is so right. It has no problem driving the Cremona's at all. I believe the 275 is half the price of the 402 also.
I would stay away from the 8 year old Classe stuff. Although it has a good build quality, it is still 8 years old. And as much as I admire Krell gear, (it looks cool to me), I would not put it with those speakers. Krell is just not musical gear (if anyone else posts, save the flames please, it's just my experience). I had the 400xi also, and it has balls, but just not in the same league as the Cremona's. They are truly like an instrument, don't short change them.
