Hypothetically, if I ever make it to the track, it'll be for fun and not competition / racing. So I'd be riding strictly streets for commuting and fun. With that said, people seem to be all over the board as far as cranksets, with some saying there's a very noticable difference in stiffness and performance between getting something higher priced like a 75 over an RD, and others saying you'd never notice a difference blind tested. So I'm confused as hell about this matter. This is going to be going a Bridgestone NJS track frame by the way (non-dented one), so a stiff frame. I'd be paying 200 for BB+75 for 100 for BB+RD...... So whats your opinion on this?