I've already driven an S2000, my conclusion in a nutshell...........gokart on wheels, I like it alot.
I've driven the closest thing I could find to a Z, a G35 Coupe on stock 18"s + Brembos, braking is phenomenal and it's nice to have some torque on the low end.
RX-8? It's okay, not a fan of the kickout rear doors....and a good reason why I'm not considering that car is that it has no damn pistons.
BMW 3-series? Don't think I'd settle for anything less than the 330ci, and that's way out of my price range....I need some kick in the pants. Sure the 3-series is proven over and over again, there's just too many of them around here.
Then comes the EVO. Haven't driven it yet but Spec R (name on this board) has ridden in an EVO and my car. In terms of power delivery, he said we're very similar but I have a much meaner top end.

I need to test drive one though. However the major drawbacks about that car is.......it's too too high profile even without the wing and the fact you can run a 12.5 with just a full exhaust spells t-r-o-u-b-l-e if I ever get the itch again.