I have the same system as J08M3. Same ES mufflers. I would not characterize the tone as having rasp. I guess we all call it something different. The white M3 that has the Eisenmann race, is a local guy. We met up. Cars side by side. If anything, mine had less "rasp" if that is what you call rasp. For the record, he preferred the no drone of mine and may switch mufflers.
2009 Space Gray Carbon Leather E90 with DCT, Tech package, and EPS. Mods: Fabspeed 200 cell cats, Xpipe w/resonators and no secondary cats, BPM tune, Euro DCT software, Eisenmann Sport Mufflers, Vorsteiner Rear Diffuser II, SWS8 subs, JL Audio XD400 bridged 2X200W, built in radar