Echo what Chris said. What my buddies and I did with a RZR 1000 on 30" tires in moab was nothing short of extraordinary. If you want to wheel and only wheel, get a side by side. If you want more than a 31" tire, build a buggy and keep it light and on 35-37s max.
Me? I'm over the whole wheeling thing. I don't plan on ever building something that's sole purpose is the get on a trail and wheel hard and harder trails. Offroad on light stuff? Sure, but nothing for heavy wheeling.