Try to find a Discount Tire (www.discounttire.com ??) for great prices, they are the best in my area.  I know the BFG AT are much more expensive that the BFG MT at the local Sears as well.

Don't get the BFG AT tires if you are mostly a trail ride.

I have BFG MT tires and they are great, but a buddy of mine punctured several side walls on his and has had better luck with the MTRs.

If you don't do much street driving then the Swamper Bogger has to be the #1, I didn't put in a vote yet because I am still considering bias vs. radial & they seem a bit narrow at 10.50.