I highly... HIGHLY recommend the Mills Acoustics Afterburner cabs. Hands down the best cabs I've ever played and I've played just about all of them (VHT, Mesa, Diezel, Bogner, ENGL, Splawn, etc.). My favorite have always been the VHT and Mesa cabs, and while they still hold a place in my heart, the Mills cabs just flat out smoke them.
You can dial in as much bass as you want and it never sounds flabby... it just converts that bass into power. People might be turned off by the v30s but there is no harshness to them. once broken in the cab is smooth, with just enough mid bite and a super powerful low end. It has the most clarity I've ever heard and at the same time projects a very 3D sound (not laser beams as most closed backs tend to do). This is done with an interior ported baffle (called the afterburner)... it basically will kill standing waves which usually cause boominess and flub, especially with bass heavy amps. By killing those standing waves you can dial in more bass to create more power, and at the same time retain clarity, which is an elusive balancing act.
They're also priced right near your Mesa cabs and slightly cheaper than VHT and Bogner... also David Mills is a class act. The cabs are factory order only now (no dealers) so you end up dealing with Dave one way or another and he's an incredible guy always making sure your 110% satisfied with his product (the way it should be).
Anyway.... as you can see these cabs get me excited (as do they get Fixxer excited). If anything they are worth a serious look at if your in the market for a top quality, high end cab that may be the cab to end all cabs.
http://millsacoustics.com/models.html