My truck didn't come with fifth wheel prep so I installed rails. I think they're more solid than any of the turnover ball setups, which can have bed deflection issues. Any rail mount hitch works with the rails, plus I can easily drop a gooseneck ball on them for a gooseneck setup. I'm using a rail mount Andersen for my fifth wheel and love it - light and super solid, and it works great in my short bed.
There are lots of great options these days. B&W has a great reputation so I don't think you can go wrong with them if you go that way. Or Andersen for that matter. Lots seem to like Pullright too - never used one myself but the biggest knock I've heard on them is you need to be real level to hitch it up.
