I would go with gears first as well. I know some guys have had good results using 5.38s on the 4dr w/35s. But get that superchip as soon as you can, its awesome. Install at $1,000 is a good price, any lower is a great deal.
2007 Sahara 2dr, 3.5" RK X Factor Plus Long Arm, Dana 44 Rubicon front axle w/locker, Dana 44 Rear, Poison Spyder BFH w/stinger, Poison Spyder fenders F&R, Poison Spyder Rocker Knocker, 37" Pitbull Rockers Bias Ply, 17x9 Spyderlocks, 1350 Drive shafts, Hard Rock 4x4 Rear bumper w/tire carrier & gas can mounts, Poly Pro front axle tube, Poison Spyder evap skid. Upcoming: RR Snorkel, Skid plates