If you can spend the money, get the retrax! Very nice. It rolls smooth all the time. I've heard of the pace Edwards getting too stiff ( come on it works like one of those ol-fashioned window shades) I doubt the retrax will ever bind up.
The only thing I would change is the black painted side rails. They will stratch easly when lifting stuff over them.
2000 F-150 XLT Supercab 4x4 ORP styleside, 5.4L, 3.55LS, Towing, 17" wheels and 265 tires.
K&N Filtercharger, JVC 50W x4 cd player w/remote, Manik brush guard, 2KC daylighters 150watt, Retrax bed cover, Procomp 33 12.5 x17 All Terrains, K&N catback,
Herculiner, WMS velocity tube, SuperChip, 4-5" suspension lift