Right now I'm using a Peavey MAX 158 practice amp and I think it's time to upgrade. Like in previous posts I'm looking for a growly tone. I've heard good things about Ampeg and great things about Mesa's Big Block 750. I'm afraid, however, that the Big Block is outside my price range. I'm willing to spend around $1000 for a head. I'd prefer upgrading to a head/cab configuration but would be willing to buy a combo if it was really good. Any feedback is welcome!

Thanks in advance.