Start here:
http://www.cobracountry.com/
Drive as many as you can...each "brand" is slightly different in their own ways. Given your budget you can certainly buy a nice Superformance or Backdraft without any problems. Also a used ERA would be a good choice. Doubt you'll get a Kirkham in that range, but occasionally a screaming deal can be found (especially during these rough times).
Good luck,
-Dean