This thing left a bright orange memory burn in my mind when it passed me at a local car show a few years ago, along with its engine note.
The only differences are that it had 440 instead of 340 down it side, rollcage with a black spoiler and drag slicks on the rear rigged up like this one
this pretty much what it sounded like.
http://www.youtube.com/watch?v=J7vKQO-jB-s
Never really been a fan of the 911 thought, to me it seems like the Dean Martin/George Clooney of cars, notable but not really that special as they'll always be another new one coming out tommorow.