Sure there are plenty of opinions out there as a quick search of forums reveal but to get a current viewpoint, what are your recommended pads for both a front & rear (after a full caliper rebuild).
Have used EBC, as f90x says above, and the standard BMW ones in my Brembo callipers (2001 model R1100S) and both are fine for normal and track day riding.
Just make sure you get the right ones for your callipers.