A 3" lift of your choice, 33" inch tires of your choice, and wheels with backspacing over 4" if your going to run a 12.5" wide tire. You may also need to either drop your transfer case skid, do a MML or get a sye and new rear drive shaft with adjustable upper control arms for the rear.
That's the basic way to do it, you can also do a smaller lift and squeeze some 33's in there, might take a little modification to the wheel wells and fenders to get it to work. I know some people run 33's on 2.5" of lift, just need to adjust the bump stops to keep the tire from rubbing and keep the shocks from bottoming out.
1999 Black TJ I6 Auto - Rough Country 2.5" lift, 31x10.5x15 Goodyear Duratracs
2000 Green TJ I6 5spd - Stock
Agreed 3" of lift of you choice all suspension or combination of suspension and body lift, the most common is probably 2-2.5" spring lift, with a 1-1.25" BL, this way will reduce you chances of getting vibes, and if you do get vibes you can add a MML to fix them. And to be honest I would do the MML just so I didn't have to mess with the shifter linkage, t-case linkage or the fan shroud. Otherwise you could go for suspension completely but you will most likely need a t-case drop or SYE and CV driveshaft to get rid of the vibes.
2003 Jeep Wrangler Rubicon
4.0L, 42RLE, Dual Tops, Full Doors, JKS Front Disconnects, Cragar Soft 8 Black Wheels, 33x12.5x15 Goodyear Duratracs, .75" Front Coil Spacers, Bushwacker 6" Flat Fender Flares, Skid Row Steering Box Skid, LubeLockers, Rubicon Locker Mod, OBA, Cobra 19 Ultra III CB, 3' Firestik, Rough Country 2.2 Steering Stabilizer, RC 1.25" BL, RC 1" MML, RC Grab Handles, Fog Lamp Bent Pin Mod, 4" Apline S Series Speakers, Kenwood Excelon 6.5" Speakers, 6.5" JL Audio 6W3V3 Subwoofer (in center console) w/MTX Thunder 202 amp, IPF H4 Headlight Housing, Sliverstar H4 bulbs.