For anyone who's interested, here's a recent comparo of the 350Z Roadster agaisnt Boxster S, Z4 3.0, and TT Roadster. The Zed did not do too well, but still a nice read.

http://motortrend.com/roadtests/coup...onv/index.html

ps. At the end you can see the perfromance numbers that they clocked for all the cars o nthe same day.