if you decide to get the mud grapplers you will be very pleased with them......i'm running 33x11.50x16's right now and i love 'em! they are amazing offroad and ride suprisingly well on-road (although tread wear isnt the best). and they are the best looking tire period! i almost went with the 33 and 18 but i settled for 16's and im kinda glad i did. although 18's wouldve been hot.
as another option you may want to look into Toyo M/T's. they are in the same price range as the nitto MG's but they have way better tread life and ride smooth too. they were my plan b but i went with the more aggressive option