Do you want true factory replacement look? I have a friend that got his done for $800/chair which I thought sounded like a reasonable deal for factory replacement. I can get a name if needed.
I like the katskinz look, but not as a hodgepodge replacement for factory leather. If you are going to go katskinz, then do all the seats so they match.
My wife's uncle has the Carhartt covers. They are nice, and fit better than most other seat covers, but are still just that, seat covers. His is a KR, so he puts the covers on when he goes to the ranch, or is at the coast and may be getting in the truck wet or sandy, but he doesn't use them all the time. I've helped him put them in a couple of times, and it's a bit of a pain in the ass.