definitely a cool lookin' tire , but it's possible it might be too mud-oriented for street use. do you get snow in your neck of the woods? mud treads don't seem to do well in the frozen stuff. I don't have any personal experience with that lift, but I see it has the longer lift leafs, which is much better than short ones.
I can comment on tire size since I had a stock 4.0/stick way-back-when and the 3.07 gears in your axles are going to make driving around less fun since the bigger tires effectively reduce your axle ratio and make your engine feel less strong. I had 30" tires andt found it frustrating some times when pulling away from a stop. later on, after my dana 35 ate itself, I upgraded to a 3.55 ratio axle and it was much better. with 31s, I'd suggest 4.10s if you can find the axles.
be careful about 4x4s, as there is a slippery slop of upgrades where one begets anothe, which begets another, etc. each inch of lift/tires seems to cost twice what the last inch did. but that mostly means that you need to have a plan and know what you're getting into so you don't get overwhelmed. planning is all free at this point.