The 33x10.5's w/ 5.13's should work great on the street and in most trails. Plus the narrowed tire will cut down on the rolling resistance of the tire (no to mention making it easier to keep the tires off the springs and under the fenders at the same time w/o huge flares). Only issue is the tires will tend to flex more side to side when steering at speed, but if you're thinking swampers, they're stiff enough where they should be fine.
If you do alot of rock crawling, consider a set of 4.16 t-case gears and some 4.62 gears in the diffs. you'll get about the same hi-range gearing and the low range will be better for the rocks. This was the route I was going to take before I got a nice deal on a set of 6.5 t-case gears and a $20 stock t-case to swap them into.