305/55 or 275/65 20" Tires?

Just picked up a set of 20" Fuel Assault rims for my 05 Off Road. They have +12mm offset with 5" back spacing. I have 5100 billys on the front with 08 springs set on middle clip. Giving me about 2" lift or almost level sitting.

I'm trying to decide between a 33 x 12 tire (305/55R20) or a 34 x 11 tire (275/65R20)? I haven't done pwm yet, but am willing to.

Any one got either size and pics/thoughts?

Thanks!

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