I guess that would depend on what kinds of mods you find interesting, your level of DIY ability and how close your nearest Pull-A-Part is. A lot of mods are done with parts from Explorers and other cars with goodies that will fit or can be adapted to your truck. If you are more of a "bolt 'n' go" kind of guy, it may cost you more dollars to get some "wow" going on. Look around the forum, build threads can give you some ideas of things you can do. That way you can see if you like the mod before you do it to your truck as well as find "how-to" posts here and on other forums to give you an idea of what you have to do to accomplish the mod.
5th Gen - 2003 - Ranger Edge / Extended Cab / Flareside / 3.0L / Auto / 2WD /Sonic Blue Pearl/
So many mods... so little time...