I dunno, a friend of mine runs a Sunn 300T through an Ampeg 8x10 and it sounds as good as any bass amp set-up I've ever heard.
They sound great but they are HEAVY. Getting them up stairs, into cars, onto stages, etc. is one helluva task.
I've actually been thinking of getting a Behringer 2x10 at some point to go with my Peavey 1x15 which is very nice but something to give it a little more capability with the high end couldn't hurt. Behringer make much better amps than people give them credit for, I dearly love my BX4500H head.
Their heads are fantastic, especially for the money. But, If you're just getting a cab- my advice is don't. Those Bugera aluminum cone drivers suck something fierce. The aluminum WILL tear away from the rest of the speak and you will just end up replacing them. My combo was also severely improperly braced, which lead to all sorts of additional weird noises. If you want the added attack of aluminum speakers, you might want to go Hartke. If you just want a good cheap 2x10, try Avatar or SWR.