hi Nicolas,
I had ridden F2 Silberfeil 168 during 2005-2006 season, and I had to repalce it with something more stiff, since the silberfails are extremaly soft boards, so if you are looking for a slower rinding style and tight turns , the 168 Silberfeil will suit you well, however, you will find it less stable at the higher speed. I am 5'9 , 175 pounds and it was way too soft for me, but considering your weight you should be fine. Hopefully this post will help you make the right decision.
wojtek