Shnobel claims the ones with the 'PICO 0327' board and dual MN3005s are the best. I've had two later revision big boxes with quad MN3008s though, and both were (are) great. I still have one of them. I'd love to get a second to run together (one short/one long) like Andy Timmons used to do.
Older Timmons rig, check out 3:35 in:
I'd love to find one of the small number of big box reissues with the sockets for the 4 3008s, but were delivered with a pair of 3005s. Drop in another pair of 3005s and you have a traditional big box sound with 1.2 seconds of delay!!!
DMMTT all the way.
Everything that's great about the old memory man (I've compared mine directly to a 120v model and they sounded identical) with none of the things that suck (better bypass, more headroom, more delay time (over 1 second, which also means quicker times are cleaner), more control over modulation) plus tap tempo, subdivisions, effects loop for repeats, expression pedal control over all sorts of parameters and the ability to wire in addition remote controls over expression mode or subdivision mode. And it's the same size as the XO and runs on 9v. It is the ultimate DMM.