Welcome to C5! Though some features like Halos can be added later, I'd get a major piece like a sunroof as a factory-installed item so you save some serious $ and get the factory warranty. Similarly, getting certain items added later can mpact warranty claims so think carefully when planning for the up-front and deferred items.
I think the Camaro is a gender-neutral vehicle that has appeal and can be customized for both guys and gals alike, so don't be detracted from your quest by any nay-sayers. Hope you find the car you're looking for soon!
