Jeep has been making factory soft tops and hard tops much better with new technology. Unfortunately, the hard and soft tops of years ago, do wear out and we need to replace them. There are many configurations and brands of both hard and soft tops on the market these days, as well as many price ranges. Check back often to find some opinions and reviews of tops on the market. Commonly found brands of Jeep Tops:
Of course, Bestop is the biggest brand, and in my opinion the closest to factory quality. However, they still use a lot of velcro and less expensive ways of doing things, so if you're used to a factory top, you probably won't like the Bestop as much as a factory replacement.
You can get more details on Jeep tops here: