I had axxis metal masters on my stock P10 brakes, and I didn't particularly like them. They were noisy, dusted heavily, and didn't feel any better than the raybestos ceramics that they replaced.
When i went to the 11" P11 rotors, i swapped to EBC greenstuff pads. They're great for street, but are eating my rotors up. They also tend to fade a bit after some hard driving. I'd still recommend them for anyone who's planning on a street setup, as they've got good bite cold, and don't fade much when hot. I'm sure they'd start to fade worse when pushed on a track, but I don't have any actual experience to go by.
I purchased some HPS pads on clearance, which will go on as soon as these EBC's are worn out. Also picked up some sets for a Q45 caliper upgrade which I plan on completing sometime this year. I don't have any personal experience with them to give a solid review, however my vote goes to them because I didn't particularly care for the Axxis pads.