I'm in the process of prepping (getting an early start) my '07 BMW F650GS for a ride from western NC to Inuvik and then over to the Dalton Hwy via TOTWH and the Alaska Hwy. Expecting to log somewhere in the range of 11,000 miles. Starting out on Metzler Tourance and expect to have to change to more aggressive tires once into the NT's. TKC80's seem to be a popular choice, but I also like the looks of the Dunlop D606's. Has anyone had a chance to use both, and, if so, I'd like to get your feedback. Thanks.