I just put a bestop supertop on my fiberglass bodied jeep. Worked great, seals tight, and is about as good as a soft-topped anything can get. If your jeep is fiberglass, you may need to figure out your own way of attaching the frame rails to the body tub of your jeep. I've never read any complaints about bestop supertops, and I found them cheaper than kaylines. And to me, the material used in the supertop seemed stronger. I'm not certain how the kayline comes down or goes up, but for the supertop, It's a one man, 3 minute operation. There was a post last week about supertop v. tigertop, and a guy said he had problems with the tigertop not sealing at the windshield and over the doors (the tigertop is the one with the folding "sunroof" feature). But I'd reccomend the bestop supertop wholeheartedly.
Measure once, cut twice...or is that the other way around?