Yes you could go with 17" wheels but then the weight would be the same as stock. But you could have 17"x 8.5 all around and run 245/35/17 toyo ts-1. They are the only manufacturer I know that makes this size.

If you run them on all four corner the traction control and cruise control will still work correctly. And the 245's will fit in front. What seems to screw up the traction control and other functions is tires sizes that have a big difference in diameter between the front and rear of the car.

Jeff