Which would you rather have? What are the pro's and con's of each?
Toyota Supra?
or a Mustang Saleen (supercharged 4.6L)

I'd go for the Saleen since it is derived from their racing program. The Supra is just plain old and looking it's age. I can't even remember when it went out of production. It's been so long since then. I'm sure the new Supra will be awesome but it won't be in production anytime soon.