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I own a 2008 G35Xs and find that the front end tends to "wander" ,particularly with uneven pavement, as we often have in colder climates. My dealer said this is due to the 18" tires, which are Dunlop and another guy told me that he knew of another G35X owner who upgraded his tires and solved the problem. I don't want to spend another grand to upgrade the tires if it doesn't work. I only have 6500 km, or 4000 miles on the tires so it's not wear on the tires. The front end has been checked and the dealer says the wandering is normal. Anybody else experience this or any ideas out there?