I'm sorry to say I don't own a Boxster, but I do have a good german car.
I'm going to upgrade my 1973 Super Bug with 17X7 wheels (yes, they will fit, with some work).
I'm looking for the wheels but will take a good wheel/tire package (the tires I need are limited to 205-40-17 in front and 225-45-17 in back).
I really prefer to look at the wheels 1st, so if your in Los Angeles and have 4 wheels you want to sell, please e-mail me.