I got to use a Super Twelve T recently at a rehearsal, and it was very, very good. Very light, and a nice tallish shape so you can hear it pretty well even if you're standing close to it. It sounds even better elsewhere.
Loud enough and deep enough for just about anything I can think of, and I use ACS ER15s, we rehearse that loud. The finish (handles, etc) is the only thing that doesn't feel like a £750 cab, but the built-in wheels are a great idea.
Having re-read the OP, I'd say that for more punch, definitely consider a Schroeder - the low-mid hump of these really sounds punchy and present in a band situation, mine's great for the two-guitar rock band I play in.