Is the B&O in the M5 anything like the B&O in the RS5? Both my friend and I listened to that during a test drive and we unanimously thought it sounded bad. Even some of the guys on the Audi forums prefer the BMW HK:
http://www.a5oc.com/forums/a5-perfor...g-olufsen.html. The EPS system very much reminds me of the B&O in that car.
Anyway, I really feel like there is a lack of midrange with EPS. I've tweaked the EQ settings quite a bit but it's still not right. That system gives me a headache after listening to it for 10 minutes!