with 6" of lift you could fit a 35" tire with very minor trimming.....but with that comes gears and other mods. it wont drive the same with the heavy tires...
honestly man id keep your MTRS they are awsome tires, and go with the BJ spacers and some shackles or leafs in the rear, then get a 1" BL if you wanna goto 33" tire but they will require gears also...forget nerf bars there uslesss get a set of rocksliders they have both functionality and looks, with all that money you will have extra buy lockers and hell get a snorkel so you can go scuba diving in mud