Over the years I have tried A LOT of cabs, and the Bogner 4x12's have proven the best for my application.
In my opinion, you just can't beat them.
I found a Suhr CAA 4x12 (made by the same folks as Bogner cabs, according to John S.) loaded with Scumbacks, last week in Orlando. The cab itself sounds identical to my Bogner cabs, due to VERY similar construction. So if you see one of the CAA cabs available, while searching for a Bogner, you might want to check it out, too. Even before I added the square of polyfil on the back panel, they sounded almost identical, but with polyfil you cannot tell them apart.