I love the L7 system. Crystal clear and the bass response is great.
For those saying the B&O systems in Audis aren't that good, maybe you need to play around with the settings a bit more? I personally have not heard the system but from what I've read, it should be far superior to the L7.
COBB / AR Downpipes / ER FMIC + CP / AFE Stage 2 Si / Forge DVs / HKS Exhaust