Don't bother wanting an upgraded clutch, that Luk is what you want... it is well known to last over 200k miles even when abused. I regularly literally smoked my Luk clutch disk for years while rock crawling and it was still in superb condition at 162k miles when I replaced it as a precaution after having been invited to do an exceptionally tough rock crawling trail.
Especially don't go with a Centerforce like you see advertised everywhere. Centerforce's design is for high rpm/high-hp racing applications where the higher the rpms, the tighter it holds... not something needed or desirable with a TJ.
Luk has a superb reputation, that's the only clutch I will recommend.
This is one of the many times I smoked my previous TJ's Luk clutch. I probably drove on that clutch another 50k miles after that photo was taken.
I replaced the original clutch/pressure plate/flywheel/throw-out bearing at 100,000 miles and you could barely tell the difference from the new one. The only reason I replaced it was because I already had the jeep apart. The only thing I found worn were the throwout bearing, the nylon pivot-ball, and the wire clip that hold the fork to the pivot.