I got my copy of the latest Best Motoring video yesterday, it tests the RX8 and most importantly modded 350Z's. Funny to watch the RX8 get toasted by everything but a Miata in the 5 lap race. The race has a S2000, WRX, RSX Type R, G35 coupe, Miata and the RX8.
The modded Z race was awesome, they say several times what a difference ECU tuning does for the 350Z's - I've been waiting for Nismo to step up to the plate with an ECU upgrade, don't know how long to wait, maybe I'll go with technosquare??