I think it's important that, whichever amp you try, you try it though your cab if possible. If you're on a budget and don't mind a bit of weight, a used GBE750 ying-yangs nicely with that cab. I believe a GK 1001 RB ii would, as well (and it's shallower), but can't say from experience. A number of other heads are worth considering, but that's the general direction I'd lean. If you're able to try one of those (or something similar) against your favorite micro, I'd be interested to know what you think. Sometimes, certain amp/cab pairings surprise you (surprise me, anyway).
Again, good luck.