I agree to keep the ABS. I tried pulling the ABS fuse for a session at my last track day, it was entertaining.... There was just no way that I could carry the same speed into braking zones that weren't a straight line without locking up a tire. Straight line braking was great though... I was about 2 sec a lap slower than my previous sessions.
Sorry to threadjack, but is the STI ABS pump different/better/less intrusive? I have an '06 STI 6 speed, with DCCD pro etc. and was wondering if that would be a worthwhile upgrade on my 03 WRX.