Yeah, if it was a GT500, id be all over that. But since it isn't, it would be (IMO) a downgrade. Like going from a nismo to a regular Z. Or in your case, from a nismo to a regular mustang.
But hey, Whatever make you happy!
they told me id regret a 2 seater and till this day ive proved them all wrong
Your going to drive it, not us, so take the stang for a test drive and get a good feel for it.
GoodLuck with your decision!
(Ps, if i had a nismo id Never sell it
lol)