Depends on how much you want to spend (time and money wise) and whats actually wrong with your original front end.

Unless your dead set on putting another front end under it, I would first go over what is already there, you might just need a good front end rebuild and alignment. Check everything to include the steering box and your tires and wheels. You might also check around the aftermarket (and thru Ford) to see what upgrades/HD parts are available.

If your going to do a front suspension swap, check around and see what other people have put under these and what works/fits and what does not.

Although I haven't put one under a truck this new, I personally like the chrysler Aspen/Volare type units.