Well remembered Mike, i got my discs replaced as one was warped. They wan't to replace just one but a crafty bit of negotiation got me the other one too. Seemed a shame not to change the pads at the same time to i'm now running EBC Red Stuff. They're definitely better than standard with more bite and more progression.
I think the reason that EVO got mixed up was that they were going to do a Buyers Guide for the general Z4 range not just the M.
Take a look here - I was going to give them a few words and try to get my face in the mag..