Discuss the issue when considering a new hitch and where to mount it. You have a bit of flexibility in placing the hitch in the bed and can "cheat" a few inches toward the rear if you need more clearance. Also, the particular make & model of truck has some effect, both in the shape of the cab and what's underneath the bed. So measure up your new truck and talk to the hitch shop about placement, or get the hitch install manual for models you are considering (often available online) and see just where you can mount it. The ideal spot is slightly forward of the rear axle, usually about 6", but you can go back some on most truclks. I had one where we mounted it almost directly over the axle.
I don't know much about the new hidden rail" hitches, so can't advise there.
The basic "pro" of an automatic slider like the Pullrite is that you never have to worry about a cab strike. The basic Con is that it costs a bunch of money. If your trailer always clears the cab, even if only a finger width, then you have no worry, so why spend the extra money? But if it could hit the cab in an extreme turn (but not in any reasonable turn), then you have to weigh your own skill against the cost. Basically, will you be paying attention enough to notice that you are near the point where a cab hit is possible. Those who have difficulty backing trailers tend to get absorbed in the problem and may not realize they have reached the risk point (if there is one). If you are fairly skilled in backing, you probably won't ever get to the risk point and will know you are there is you do. In that case, no need for a slider.
A compromise is manual slider. Less expensive than an automatic but available for use if needed. I might pay for one of those if a cb strike was possible on my rig but unlikley except in extreme turns. I'm comfortable in relying on my skill and my attention to where the trailer is, Are you??? That's what it boils down to.