I've not used a Peavey 60/60 but others here have and seem to say good things about them. The Carvin TS100 is a great amp, I've had one for about a year now and it goes really well with MP1/2 all tube and half the weight of Dante's ADA T100s. Prior to that I used ADA B200s, also a great amp (for over 25 years). The B200s is so transparent you don't know it's there (except that you have lots of grunt
), the TS100 is also very transparent, a little warmth from the tubes maybe and a good solid 50w per side. The other amp I'd consider (though haven't tried personally) is the Carvin 1RU range, there was a DLM100?, the new version is a DLM200?, very light and compact, designed to run studio monitors (i.e. perfect for ADA pre-amps).
Just checked some pics of the Peavey: Pros, seems a good quality old school all tube amp and has some interesting I/O features on the back (the line outs you probably wouldn't use with guitar (unless you were stacking them for a huge stage rig)).
Cons: old, no doubt very heavy, big rack footprint (4RU?), controls on the back (were you can't get at them).
IMHO the TS100 would be a much better buy (albeit a bit more $s), they're brand new, 2RU, kicks ass, power, vol and presence knobs on the front (so you CAN get to them), better speaker out setup and, (not that you'd want to), runs in bridged mode as well (mines a 6L6 variant, however you can change to EL34s if you want).