I have a VW Jetta Sportwagen with 17" wheels and Conti 225/45R17H low profile tires. Ever since I first bought the car, i have been annoyed by the higher-than-expected road noise. Perhaps this is caused by the tires, perhaps by the body characteristics of a wagon, perhaps it's just the noise anyone would get from a Jetta chassis. The tires are due for replacement soon, and I'm wondering if I would experience a meaningful reduction in road noise if I switched to 16" wheels and less sporty tires? It wouldn't be cheap to replace wheels and tires, but it could be worth it if the noise level drops significantly. Has anyone made this kind of change and noticed a real difference? If the wheel change is not worthwhile, which 17" tires would be a quieter choice?