The Bontrager XR4 tires that came with my Trek are starting to wear out and I am looking to get a new set. Anyone have a favorite combo for front and rear? 99% of my riding is in the Twin Cities area with the occasional trip to northern MN. Looking for something lightweight but grippy for the hardpack we all ride. I like to go fast so something that will hook up in the corners is a must. Has anyone used Schwalbe Hans Damf, Racing Ralph, Racing Ray, Rocket Ron? How about the Maxxis offerings? Thanks for the thoughts!!