I ran DS2500 on my 130i with slotted discs, the performance on track was fantastic. After a while they started squealing on the street driving which was a bit annoying for a daily drive.
I've heard great things about PFC also, but not tried them as yet.
Recently I came across was Carbotech, with a guys who runs on production racing Subaru. His view was Carbotech is cheaper and better feel/feedback than PFC.
Rather than going for a compromised pad between street & track, a lot guys are changing pads for the track and running OEM for street.
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