Re: M experience.. anyone?
for the money, I suggest we spend it on the Nurburgring one. It's a lot more worth it, for the history, heritage, and respect accorded to nurburgring vis a vis salzberg. If you can time it with the nurburgring's open track day, you can even extend your tour by renting a race car for the open track day, which will allow you to run it faster without having an instructor curb your speed in front.
several of us have done it, and if one is a die-hard racing fan, one would definitely have to make this pilgrimage to nurburgring at least once in your lifetime. you can either book it through BMW in spore (which will cost about 2.5 times more) or through direct lobangs, which will be cheaper.
my 2c.