I'm not fond of the pocket flare look, preferring something that provides a cleaner line, while offering tire coverage. The BW Flatties have worked well for me. I like them painted to match, I've had several non-XJers comment about how they like my factory flare option better........:shhh: For reference, I'm running 6" of lift and 285/75/16 tires.
I too don't view my rig as disposable and was concerned about introducing a potential for rust by notching the wheelwells, per BW instructions. For this reason, I added an extra couple of steps, taking the time to weld the notches back together and then primed/painted the area to minimize rust.
http://www.bushwacker.com/Instructions/10922_r0.pdf
The rear flares have held up to a rock-kiss or two, but if true durability and protection is your priority, fabbing a set of tube flares that are similar to the BW flatties and incorporating them into reinforced quarter/fender armor (JCR?) will give you the best of both worlds.