Unfortunately, not that many of them have the "original" V10-sound intact, due to aftermarket headers... Nevertheless, cool video
Is the black one, @5:40, with the "...PS 507" license plate, a stroker? It seems to have a ton of TQ and some serious traction issues
That M5 is in a lot of scenes, in various videos, on YouTube and it seems to have a pretty good tune for the SMG as well.
Based on what I could find on the internet (and we know they don't put anything on there that's not true LOL) the black M5 is a Dinan Stroker.
If that's true it sure does them proud. More car than driver skills though.