Check out the thread above. It's a fairly complete write-up on all the things that you'll need to address for a low-profile skid plate install. The skid plate itself is only about 25% of the total cost. Figure that (starting from scratch) it'll cost about $1100-1200 for a complete install. The reason being is that if you have ANY suspension lift at all you'll need:
$250+ - Skid plate
$550 - SYE + CV driveshaft
$160 - Adj. Upper Rear Control Arms
$150 - 1" BL / MML
$60 - T-case shift linkage relocation bracket
$120 - exhaust tweaks from a mufflershop
Because the low-profile skid plates jack up the t-case so much on a lifted Jeep you then need a SYE / CV driveshaft because the u-joint working angles are too severe on the stock driveshaft. And then, because you have a CV driveshaft you'll need to re-set your pinion angle (via the adj. upper control arms). Most belly-up skids also require a 1" BL. And then because of all this shifting around your transfercase linkages will probably be messed up . . so you need to address this. Finally, because you have an exhaust hanger on your t-case mounting bracket the exhaust is now shoved up against the body tub. So that needs to get tweaked.
Don't be scared off the mod. It's very nice having the break-over clearance. Just be aware of all that is involved. It's a lot more than just the skid plate itself.