I put on a set of Thule bars. Their fit kit utilizes the factory mounting points. The bars themselves are a bit higher, but you get a proper t-slot that I prefer for mounting a roof box. If you don't care about t-slot than factory is lower priced option.
I went for a Rhino-Rack set up on my 19 EXL. They clamp to the door frames. I didn't like how far back the factory bars sit especially when I carry kayaks. These are much further forward. I also like them for easy removal for the winter.
The factory bars sit far enough back that I would make sure there isn't a tailgate clearance problem using factory bars and your specific rack.