I use SRF for a year with 15+ track days. I only bled the fluid and the brakes work great. I do a full flush once a year and each time the fluid wasn't dirty (slightly off color) and pedal feel was still great.
I got tired of flushing the motul after every track day, once that fluid boils its done. It's track dependent, if the track is brutal on brakes then SRF would be my only choice if you don't plan on flushing the fluid after every track day. Over the course of a year, you'll save money using SRF.
I haven't tried the AP fluid or Endless so I can't comment on their performance, but I know SRF performs so I'm sticking with it.
Last edited by Bubbles; 02-23-2012 at 08:33 AM.