Welcome
Good luck in your search. Both are great cars. I kinda agree w mrcoolfaceguy as to his opinion of the vette, though it undoubtably rips! I like the relative unique/rareness of my 370
If you do go w the Z and plan to mod I would go w the sport over the Nismo. Not to offend ANY Nismo owners, its beautiful and I kinda wish I had one. But , the $ saved gettin the sport is better spent on mods you personally want over what the Nismo offers. Anyway you go you will end up in a superb automobile!