A C5 FRC is probably the best deal going in sports cars. Other than getting an insane-o deal on an already very built Z06 like I did, I’d say getting a FRC is the way to go.
Jump straight to the Pfadt coil overs (~1600) and sways (~1k), do H/C/I/LTs (4-5k) and you’ve surpased a Z06 easily. The looks are the same (just add the Z06 screens + the aftermarket ones for the fender vents that didn’t even come on the Z06 like I added), almost all of the weight reduction is there (the only difference I think is the thinner windshield on the Z06) and in some ways I think the MN6 gearing of a FRC is better than the M12 gearing in the Z06.
-TJ