My Brembo BBK's came with the DS2500's and they worked great for both street and track use. I was amazed that I got about 10000 KM's of street use and a good 8 or 9 days of track use.
I recently replaced my pads and stuck with the DS2500's in the rear and out DS3000's out front. WOW what a difference in stopping power and the squealing for street use is not that bad. When it was warmer they weren't squealing on street use but now with colder weather they are but it's livable and my M3 is in storage as of today.
I highly recommend the Ferodos and I suggest you shop around online. I Was quoted a good $200 more by some suppliers. I ended up paying about $225 for my front DS3000's an was quoted as high as $450 by some suppliers.
2012 E92-M3 Space Grey on Fox Red, DCT
2011 B8 S4 S-Tronic , Black on magma red