I wanted the same I opted for the RH Wheel 3.6 18 inch I also put spacers on them ( rear only 12 or 15 mm )
These are true 3 piece wheels. Got them at
www.wheelexchange.com
compared to the turbo twist 18's the car come with after market rims are a bit soft ( and do bend easier ) I had to get mine repaired within the 1st year also, if you get curb rash, it cost $300 for a new lip to replace the lip at the factory.