Towing package, which includes not only the receiver hit and wiring harness, but the 4.10 gears as well. Limited slip differential is another nice cheap upgrade. Power convenience group is nice, especially for the four doors. Everything else is pretty much an individual preference. A popular option is the 23S quick order package for the X.
__________________ 2014 Copperhead Pearl Unlimited Sahara in progress
Sahara comes with limited slip, if you are doing any hard wheelin, i would consider the rubicon, for a few grand more. the pic is my first JK a sahara it was a awsome ride, but not what i needed for wheelin. rock rails, lockers, mud terrain tires, sway bar disconect,
dana 44 up front.
I think the only non-must have options are tinted windows, upgraded stereo, and smoker's group.
For me, the must haves included power group, dual tops, side airbags, tow package, 18" wheels (since I couldn't get a rubicon), LSD, automatic. If I were ordering something, I would get a Rubicon, suitably loaded.