You should always consider the weight of the wheels when buying new wheels. I switched to some 20" wheels from Rennen. Not only are they lighter than the 19" OEM wheels, they are forged and stronger.
I noticed a more eager response to transitions, acceleration, braking and turning. Even the steering felt lighter. See this
thread. I got them from Sean at
Oakville Motorwerks for a really good price. You can see some of the Rennen wheels
here