Mark,
Like the guys said, welcome to Club Cobra !
Best bet is to go to some local CC events and talk people & look at their cars to see what you like ... and you will also meet some very nice folks in the process.
For an overview of what's out there, take a look at Cobra Country.
http://www.cobracountry.com/home2.html
Lots of great cars and a 'used' car is a good value. Even if you wind up buying a or building 'new' car, always good to do lots of homework before pulling the trigger.
Most of all ... have fun!
- Tim