I am using aftermarket Ultra Motorsport rims. There are lots of people here in the states using the stock 16x7" rim (should be the same size as the Euro Spec) with a 285/75 R16 that I have seen firsthand. That size is possibly pushing the width limits for a 7" wide rim, but there are many choosing to go with a 255/85 R16 which is essentially a 33x10.50 that works better on the narrower rim.
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Yes I am using a spacer. I have 1.25" Spidertrax wheel adapters. They aren't necessary to fit the wheels, I just wanted a wider track.