Anyway, just to share my experience, I've fitted black diamond grooved and cross drilled discs with predator pads, and the results are positive, with more initial bite and almost no fade after repeated high speed braking. 1 added bonus - the pad material compound dosn't give off black brake dust, so now my front wheels stay nice and clean.
All this for less than the price of the standard replacement discs and pads from the main dealer!!!
I got mine from Demon Tweeks in North Wales - I would highly recommend this combination to anyone who needs to replace their brakes.
Cheers
James