Well, yes, my GCG makes the car a hell of a lot more fun to drive, but this ball bearing vs bush bearing thing only really comes into play when the turbos on the edge IMO.
I had every intention to max out my GCG at 230-240awkw, but its not easy with the auto shift logic getting the in the way.
I mean, it will be hard to TUNE (DFA/SITC) the car to max out the turbo, hence I beleive if you can save $1000 in just buying a bush instead of a ball, you will be up 1k on everyone.
Only a few days ago i realized how hard RB25's are to get power out of really. I mean, for 220-250awkw you need to spend around 10+k.... labour inclusive.
RB26+full exhaust+PFC = 250awkw/12.6 qtr mile. Plus you get the brakes, interior, body kit etc at the same time...so you dont really need to upgrade these (unlike an RS4)