An auto trany with 33s with 4.10s will yield the same perfomance as 3.73s and stock tires and slightly better performane than 3.27s with stock tires.
IMO I would get 4.10s if you do a fair amount of highway driving, low to moderate off-roading, tow trailers under 3,500 lbs, and don't plan on getting getting bigger tires.
I would get 4.56s if you do a mimimal amount of highway driving, a moderate+ off-roading, tow trailers greater than 3,500 lbs, or plan on getting tires larger than 33s.
I recently towed a 5,000 trailer and it took some effort to move it around (as in you definitely knew you had a trailer attached (braking was horrible))... It was a piece of cake towing a 3,000 lb trailer and I hardly knew it was back there)..