OF;
Welcome to the Atlanta group.....as you can tell, we have a multitde of crazed enthusiasts, all with the cobra bond in common.
I too have to give my vote for Unique, even though I own an Everett-Morrison. I spent 20 years in Tampa, so I followed E-M very closely, and always had a strong desire to own one of their cars, and came very close to ordering one several times, BUT, always seemed to be consumed with another car project.
Sooooo, here's my $.02. I like nothing better than building my own cars. That's the problem. I spent WAY too many years, and $$$$ doing just that. I visited E-M and Unique, and was about to order a kit, when I ran across my current car---it was a no-brainer. Had everything I wanted (E-M, BB, jag-rear, 2x4's, etc....and could put the key in and drive---for the right money!!!). Glad I made that decision---I've upgraded, changed what I wanted, and still had time for family, club, etc.
On the other hand----Unique makes an exceptional roller---combine that with Southern Automotive engine package, and you have something YOU and SON built, in a reasonable time-frame. Just ask Chill and Georgia Snake as recent examples.
Ultimately it's your decision---you definately sound like you have the capability and experience to do this yourself, BUT, you know how these things go-----ALWAYS more time and expense and than the spreadsheet shows. You and your son will probably enjoy the time together in the car, than actually the build process.
Best of Luck in your search, and look forward to meeting you soon.
BigEasy
Charlie