So while this amp is on the way to my house, I figured I should start thinking about what extension cab to pick up for summer outdoor shows. We generally play with FOH support but I'd like to make sure I have enough oomph for stage volume at some of the odder gigs out there that bands like mine end up playing. It's a 4 piece cover band, and I play an ESP 6. Any thoughts? I probably won't drop more than 7-800 on anything new or used, because this cab won't see that much action.