[speedraser]

To each his own. Personally, I would not buy a 'glass Shelby just because it's a Shelby, even if the price is comparable. ERA and SPF, among others, designed their chassis for sound engineering reasons. I have not seen torsional rigidity figures for any Cobra other than ERA, which refences its figures on the ERA website. While at this point I don't know which is the best chassis for my own criteria, if it turns out to be ERA or SPF, then that is what I'll buy. ERA's quality (assuming turnkey) and aesthetic accuracy is without question, and the SPF is also excellent. The chassis and body structure significantly affect handling and the way the car will perform if it's crashed. To me, if the body is 'glass, then the chassis is more important than the serial number.