Speculation by alot of folks in the older Z/28 threads assumed an msrp in the neighborhood of 48-50k based on LS7+1LE+ZL1 brakes+Pedders Supercar Coilovers+Recaros. I think with the additional upgrade to the Carbon Ceramic brakes and any additional suspension tweaks and parts made by GM Performance Engineer Mark Steilow, you could add another 10g's to that price. So it could be conceivable for it to MSRP in the 55-60K range...and then add on any ADM's if you're unlucky to by from a dealer who refuses to tack them on. *cough - Rodgers Chevrolet - cough* Beware if they are produced in limited #'s too.
2015 CRT 1SS/1LE RS/Recaro's/NPP/Nav/Rear vision pkg./BA speaker upgrade.
ARH 1 7/8 headers, CAI, BMR 1.25 drop springs, JPSS Billet Bushings ...421 whp...so far.