Another vote for tube fenders.

Besides, in my opinion they look better on TJs.

As you can see, we can't really answer your question without knowing more about the current state of your Jeep and what your future intentions are. What do you want to be able to do in your Jeep? Do you want to be able to use it on easy, moderate or difficult trails? If you are just looking to replace the stock fender flares with something to give it an aftermarket look, then I would just get the style that appeals most to you. Before putting Genright tube fenders on my 04 TJ, I ran stock Rubicon flares (they are slightly wider than stock X flares) and then 6" Xenon flares. I went with the 6" flares to keep the mud down but they were too wide for rock crawling and got beat up. My TJ started life as an X. But if you do intend to use it on moderate to difficult trails you will want to replace your Dana 35 with a 44. This group can give you lots of good advice once they know if you Jeep is stock or if not, how it has been modified. If you come to one of the club's meetings there are several TJ's you can look at to get ideas.