To get the discussion started, or until a better suggestion is presented:
First or second week of August 2013.
Malmoe, Sweden. Almost the center of Europe
http://mapsof.net/malmoe
http://en.wikipedia.org/wiki/Malm%C3%B6
BMW Club Schweden will hold their traditional Summer weekend event.
About 400 cars expected to visit. Why not add a bunch of 1M?
Sightseeing, cruising, or tracking? Your choice.
The track is located about 40 minutes from Malmoe.
http://trackreviewers.com/reviews/ring-knutstorp/
Our local BMW dealership will take care of you and your car if needed.