If there is ever a problem with the engine, the BMW techs will look at the engine data. When they see 8,500rpm, they start asking questions like "why didn't the rev limiter prevent this?" Then you might have an issue w/ warranty coverage.
That said, the car should be great. When is TK getting a supercharger for this beast?
"The laws of physics cannot be repealed, even with DSC." - BMW Owner's Manual