[tony9704]

Yeah, bring it Wavey! We've only got until midnight tonight to make this important life decision! I have read elsewhere that the RB chip does make more power lower in the RPM range. This was appealing to me as I find Autocross to be a second gear gig where I find my RPMs fairly low at times coming out of a sharp corner. It would be nice to have the power in this band as I find my Carerra has more than enough power above 4000 RPMs. The other posts use terms like "low end grunt" "off the line". They don't seem to be referring to idle and throttle resonse. I expect that from both chips. (yes, there are only two in comparison here) Maybe your experience is different than others though. I trust your judgement.