FYI, last I checked Bridgestone doesn't make the Revo in a 33" size. Infact they don't make it in a 32" either. I've been watching and waiting because I was hoping they'd come out with a 32" by next fall. They do make their regular A/T in larger sizes, but it's not as hot as the Revo. If it came down to the regular Bridgestone A/T and the BFG I would vote for the BFG. The main advantages of the Revo over the BFG are wet, snow, and ice traction. They have a softer compound and more siping that give superior grip in those conditions over any other A/T tire that I know of. That's why I will switch to them for winter tires next year.
As for fitting 33's without a body lift, it's possible, but not ideal. They'll be fine on the street, but offroad you'll get a good amount of rubbing when they're stuffed. I agree with Brent about the fact that there isn't really any other reason for a body lift other than tire clearance.