[joe s]

Great, thoughtful responses, and I do appreciate them. Yes, cost is a factor, and I've deliberated long & hard about it - fantasy does cost $$. I can swing it, it won't be a piece of cake, and I will thoroughly think things through. I tend to be like this with all significant purchases so this pondering is nothing new or of surprise to me (or my wife, who incredibly likes the car!). I will go through with this when and only when I've convinced myself I will not be one of those who sell soon after purchase because the fantasy and reality don't jive - I did this with a Porsche in 1986 and haven't come close to doing it again.
I had hoped and assumed that many Cobra purchasers have had similar thoughts.
I will keep my eye open for used Cobras, though as I mentioned I prefer the rear-exhaust small block. In response to rdorman, SPF does offer the rear exhaust, though it isn't a separate body style ie FIA. Other than the exhaust it has the FIA instrument cluster and a rivet-less hood scoop. Still looks great, IMO.
Thanks again. Your input and experience is very important.