I have a 3" IRO with a 10mm OME spacer all around.
I run 265-75-16 Goodyear Wranglers on the stock Silverblades, no wheel spacers. The tires rub the rear shocks (Bilsteins) slightly when turning or whatever, but not enough to worry about.
I don't wheel the WJ - it's my DD and exploring rig - but the tires fit well and look great.
SOA, 8.8 locked, 30 w/95 shafts locked, SYE CV, weber, GM HEI, OBA, BL+TT, TJ flares, SW Talon 12.5K, 35s = Wheeling Jeep.
Laredo, 104K, sunroof, 4.0, selectrac, 3" IRO +10mm, adj trac bar, 265-75-16s Goodyear = DD & Expedition Jeep.