Absolute score on the MC50. That's what I want. They're tiny and only 18lbs. And really, they're a 75 watt amp, and that's basically what most of our Twins are. Personally, I think the Mc50 is ideal. The Mc250 is two of them in one package, so you can use both sides or keep one side as the backup of one channel cooks at a gig from overheating.
Man, I can FILL a bar with a 24 watt Deluxe Reverb with a single K120. I'll have people asking me to turn it down sometimes. But some bands have over-loud bass players or guys who over-bang on the cymbals, and that's where you need the bigger, cleaner power to compete. I think 75 watts is a good range for this Jerry rig, it lets you light up the mac a bit, clip a tiny bit, and not damaging your hearing by creating a miserable life with tinnitus or hyper-acusis as you age. Anyone here willing to sacrifice the quality of the second half of their life by using excessively loud rigs is really gonna regret it. I hear of some people playing clean Jerry rigs thru 1000 watt amps and 4 JBL's, and man, that's one of the most damaging things you can do to your ears. It's brutal. I'll always argue that you should find the quietest rig you can get away with that gives a nice barely clipped tone at a good, musical stage volume.
... and it's just like any other day that's ever been...