A set of wide 13" steels would be cool:
http://www.thesamba.com/vw/classifieds/detail.php?id=1121951
A lot of the E30 guys are redrilling 16" E38 Style 5s to 4x100. Not sure if you're comfortable going so large but, with the right drop and tires, it could look pretty hot. The ultimate in subtlety.
This year, I elected to go the widened steelie route... With an unsubtle twist: