There are oh so many, but here are my top 5, at least as of today:
1. Nissan Skyline GT-R ('95 or later)
2. 1967 Shelby Mustang GT-500
3. Acura NSX
4. 1995 Toyota Supra (must have a targa top)
5. 2003 Mitsubishi Lancer Evolution
and just for fun, a Toyota 4runner for offroading!!!