May I suggest a set of FR-S/BRZ takeoffs? Given the amount of people upgrading these it shouldn't be hard to find a set for a nice price. Good specs for your ride.
Plus you can't beat OE quality, unless you're dropping racks on wheels.
Protip: Find people selling the actual car on aftermarket wheels and offer to buy the stocks sitting in their garage. Like this guy:
http://denver.craigslist.org/cto/4340949989.html