I've been told there are only 4 companies that make springs in the world but different companies take these springs and put their name on them. Is this true and if so what company is the better? Which one would provide the better suspension system for my 00 lude?

Some good companies would be Eibach, Tokiko, Ground Control, and H&R.

For an 00' Lude I'd try a HR spring/tokico shock combination.

Good ride and not a lot of money.