If you're sticking with OEM alloys it has to be Belvedere. They're not the best looking alloys that award goes to 19" Prets or Brescia but nothing gets close to the performance of the Belvedere and tbh there's not many aftermarket alloys that are lighter either.
I've always changed the wheels on my car's but never considered the weight of a wheel and solely gone for the best looking wheels. Never again. Performance over looks everytime from now on.