Winch, selectable lockers,swaybar disconnects, tires maybe, I don't know what the LJ's come with but mtr's good, GSA's not so good offroad. 31" tires will fit with no Lift. 33" with a 2" lift.
You should talk to your dealers service manager first and see what their warranty policies are on modified jeeps. Some dealers will still warranty with minor mods, some won't.
But a jeep with decent 31" tires will go alot of places. So you can always hold off on mods for a while. :wink:
Decent all round tires (in my opinion) goodyear MTR's, BFG MT's (but not so good in winter) Interco TRXUS tires, procomp xterrains,
Or cancel your order and buy spinalguy's TJ for 35K then you will have a great all round low mileage jeep.
Ian