We are a fairly loud cover band and one cab is more than plenty with the MG800 for small clubs, with or without PA support. I break out the second cab only for open outdoor gigs or larger theater sized venues. Caveat…. Not knowing how hard your drummer hits or how many loud guitars your competing with?so how often do you feel you need the other 12-3? I have an opportunity to buy either one or to buy a pair, but the pair would really stretch my budget for getting a good head. You think 1 is loud enough for small clubs without pa support or med-large clubs with pa support but a loud band?
I’d still say the one cab setup is pretty f’n sufficient in a small venue, regardless.
good luck in your quest.