There are quite a few posts on stable loads in this forum. I would do a search on them. I use the lower stable loads on my f250 and they work quite well. Torklift recommends that you use the lower stable loads if you can first. The lower ones are also quick disconnect, so when you do not have a load in the bed, your truck drives normal. Price wise you can't beat them.
Again search the forum for post on stable loads and you will find that almost everybody with them is happy with them. Good luck with what ever you decide to do.
Jim