IMHO, there really is no "best" body - Just the right body for you based on the track you're on and your setup. Once you understand the differences between bodies, you can select the one that best suits your needs. If you checkout the team setup sheets on XRAY
, you'll see that they don't always use the same body for every race. The advice Dale Epp (founder of PROTOform) gave me was: "Just do it. Throw on a body and see what you need to do."
This video interview with Dale is pretty interesting..
And so is this article on how he makes the bodies...
Hope this helps.