The cab alone will give you more volume, but I'd absolutely get a more powerful amp than the MB200... head room and transients, mostly.... 130W 8ohms only goes so far IME. I have a Aggie TH350 that, with 175W at 8 ohms, is about as little as I'd want to gig with, and it seemed to be limiting a bit on a couple of occasions when I gigged it with a BB2 in a fairly loud, fairly big bar. Now, when I run an MB800 with the Big Baby etc, there is never any lack of volume, headroom, etc., and it feels good. I'd bet a MB500 would be just as good in that capacity. I do use the Super Midget with an MB200 often, for not-so-loud gigs, and it really does great.