The ERA is a great car, but so is the Unique. Go check one out if you haven't already. You might just be glad you did. The Unique FIA/USRRC car is my choice when I build one, and the Weavers are a great bunch of folks to work with. Check out the Unique owner's site
http://www.uniquecobra.com/ (not affiliated with the company) for a great resource and lots of testamonials, etc.
Here are a couple of more links:
A nice red one:
http://www.uniquecobra.com/forums/showthread.php?t=8199
And this one looks like a steal!
http://atlanta.craigslist.org/atl/cto/1810989176.html
Good luck!
PS. what was your original car?