Even after my 2.5" lift I had to cut off the ends of the front bumper to clear my 35's at full lock, although at that time I was running 10" wide wheels with only 3" of back spacing.
If its a 2 dr I would just flat fender it, do some trimming, and run the 35's. If its a 4dr then I would say go with 2.5-3.5" of lift. The 4drs are long and low slung. I scrape my belly all the time. Of course my 35's aren't true (metric equivalent, so a 34.6) to size and after my winch, tire carrier, tools, etc my 2.5" RE springs are alny netting me about 1.5" of lift.
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2008 Unlimited Rubicon: 37's, 3" Synergy Springs, Artec trusses, 5.38's, Winch, PSC/Poly Cage, Bumpers, TNT Alum belly skids, and other doodads