Depends what you do with it, where you drive, and what kind of weather you have where you live and how much you want to spend.
BFG A/T's are a very good all-around tire except for mud and wear like iron. A bit spendy though.
Goodyear plain ol' Wranglers are a good all-around tire and excellent in snow, I had them on my old 99 Ranger, and have the advantage of being dirt cheap. $70 at Wal-Mart last I looked.
Michelin A/T's are excellent but very pricey, OTOH they will last forever. Not so good for off-road but if you're mostly on-road they're good.