Also, keep in mind, you would probably have to get new wheels with the widebody. The current set up wouldn't look right.
Considering the cost of things, I would go WingsWest.
Actually, if it were me, I would do WingsWest front lip, Stacys Side skirts, and 02+ rear valance from Downforce! With the money left over from not going Cantrell, I would slap on a Comptech SC! Nothing against Cantrell kit, just too much money for me. Plus, ^^ those mods can be removed. Cantrall Widebody would be extremely difficult to remove if you ever choose to go back to stock.
Just my 2 cents...