As of right now your list for turbocharger and supercharger "bolt on" kits consists of:
Yup, that's it. Returnless fuel system was introduced on some 99MY cars and was on all of em in 2000. Vortech's supercharger is designed for a return-type system, and won't work on your car. One gentleman here on the forum is working with/waiting for Vortech to come up with something to make it work(unless I've missed a post by him stating otherwise).
You'll most likely want a Quaife or Torsen (to be released in the fall) limited slip differential. The Contour has a notoriously weak differential. There are quite a few folks here that can testify to that fact, and quite a few more that will sing the praises of the Quaife unit.