FORDP/U

I have a 2014, xlt , 4x4 with a 2" level in the front only. I just picked up some 20x9, 0 offset rims, 5" backspacing (pro comp, metal mulisha edition) and wondering what would be the best tire size to fit on the truck. I'm wanting to go something larger than than stock. I'm thinking 275/65r20 (34.1"). anyone running a similar size? anyone have a similar rim size/offset and running a different size tire? any info/pics would be appreciated. Thanks