ANYTHING with Greenbacks. I've had the EVH cab a couple times, and it sounds great with the heads but I actually like either regular chinese G12Ms or any other GB variant better than the Heritages that come with the EVH. Had a VM 425a/b cab with G12Cs, and a few with regular old chinese Ms and they just made the amp raunchier to me. The Heritages in the EVH cab were too polite IMO. Still good though.
I think you'll find a BIG improvement when you get away from V30s. No offense, but I hated that amp with V30s. I've always have 1 V30 cab laying around and tried that once. Not again.