To RE since this thread has gotten some attn in the new year:
17x8 MOTEGI RACING MR118 BLK P (No idea what the offset is.)
205/50R-17 Pirelli Winter 240 Sottozeros (I might actually go for a < 205 if you have a ton of snow.)
They're on for a 2nd season. The rears have -no- tread but my fronts have plenty of life left.
For the record; the center caps were grabbed at purchase time from tirerack.
As a final note, with sidewalls this high, and rims at 17" I've had no issues with bending, this is driving over terrible rural roads and terrible NYC roads at 'aggressive' speed.