We went with the BFG ATs as well.
The mistake I made was going up in size from standard (255/70). My tyres are 265/70 ($359 each), I could have bought 265/75 for $329 each but thought that a 5% increase was far too much. Next time I'm going to wait for 255/70s to become available.
The tyres are great - the reason I'm unhappy is my fuel consumption has risen. I don't do the rough off-road stuff, I tow on dirt/gravel/sand/corrugations and through rivers and creeks, but I do travel a lot (we notched up 58,000km over the weekend, bought the vehicle in late '09).
If I ever get the urge to do the heavier off-road stuff I'll put a 50mm lift and get spare rims to put the bigger tyres on.
I'm not sure about the Mickeys. I heard that they don't have the longevity, and while you'd think the BFGs would be a hard compound and slide all over the place (reported lifespan = 80-100,000km) they're actually quite stable, but I'm not an aggressive driver.