I was thinking a 5er until I decided against it for our needs but, I have a 5'5" bed and I was going to do the fixed hitch with a revolution pin box. The Pull-Rites are nice but, they also are heavy too on a half ton truck that is already low on payload.
The few dealers I was looking at only recommended the pull-rite because that is what they were most familiar with. Once, I mentioned the fixed with the revolution and they did some more study and research on it, they saw as well that it might be a better option.
Sometimes, dealers are just more familiar with the slider setup and not as educated on the revolution or sidewinder so they don't recommend it because of that reason.
Cost wise, it's probably close to the same if not less expensive to go the non-slider route.
Good luck, let us know what you choose!
2012 Keystone Sprinter
Still sticking around for the good people and advice.