It's been a while since I tried any of the GK combos, and the one(s) I did play through may have been the older models. From what I've read, the "II" version addresses some of the previous QC issues - iirc, they're now manuf in the US - as well as the location of the DI Out. (although occasionally there'll be a comment/thread about some internal rattling caused by a loose screw or something)
I currently own a Traynor SB112. I've brought it to rehearsals/jam sessions with as few as 2 people & to rehearsals with my previous band, which had as many as 8. I've gigged with it in smaller to mid-sized rooms. Using the DI Out, I've even brought it to some outdoor gigs. Will it get as loud as my MB800 or TH500 through a pair of 12s or 15s? No. But you can certainly hear it in a lot of different band settings, especially by using the EQ - frown face, i.e., mid-boost relative to bass/treble.
I've had it for probably 2-3 years now, and haven't had any issues (knock wood). I like its tone better than the Fender Rumble line, and much prefer it to the Ibanez Promethean 115 that I previously owned.
NJ Guitar & Bass Center in Edison, NJ, is a Traynor dealer, and should have both the SB112 & 115 in stock, if you wanted to take a short trip from NYC to check them out.