Personally, I like the RX-8 mainly because of the Renesis. From what I've read, they've improved them over the original 13B wankel in that the position of the rotor is more flush with the intake and exhaust ports, and dramatically reduces blowby. So much power from such a small engine still amazes me.
The 350Z is also a very nice car. Just that there's no backseat kind of bothers me. It's suspension is built more for hard driving than the RX-8, but the interior and the overall look of the car turn me off to it.
The IS300? Please.
Why isn't the S2000 a choice? That would have been a great contender. Perhaps a 98 supra tt?