I'm gonna have to agree w/ddwilkins. If you are going up against Hammond B3 & drums & vocals you are gonna need sometining more than 2/12's. Sorry but it is the burden we bear IF you want to have great sound. I Use the SWR Goliath 3 for most gigs @ 85lbs (feels like 100lbs sometimes!) This way I KNOW my sound will be right!
Bruh what 212's have you played through?? My GB 212 destroys. When I was using my GBE 600, I'd do concerts with a B3, Keys, drums, aux percussion, guitar, AND a choir, and I never had to cut it past 1:00. Crazy thing is, you really have to push the cabs to get their full potential. Ive actually set it up in a band hall and cranked the volume to full and SLAPPED, and it never farted. Im actually in the market of going smaller myself though, mostly because my rig is overkill for the stuff Im doing. That rig you got jeremy looks right on point to. I already got the shuttle, now now I just gotta find a cab. Im nervous though, cause I dont want to downgrade in sound.