I'd recommend the DuraTracs or one of its counterparts, as well.
If you go with 15" wheels and tires you'll save $$ over the larger wheel sizes. Like MTH said, look for an alloy wheel in 15".
You want a wheel with 4.5" backspacing or less (most of the 15's are 3.75" or less). The smaller the #, the more your wheels will stick out from the Jeep.
Any questions about wheel fitment, PM or call Discount Tires Direct (forum vendor). They'll hook you up. You'll also get $$ off from them by being a WF member. If you join Tread Lightly for $25 (see vendor section), you can get $100 off the DuraTracs.
Be aware that a 33" tire will likely rub your fenders if you go offroad without some sort of minimal lift, either a Teraflex leveling kit or some other small spacer lift. On-road you'll be fine.