I had a set of Bontrager Valient's (non-UST) built, and am planning on installing Stan's no tubes kit. I'm having a tough time choosing tires as Stan's only recommends a few brands due to weak sidewall casings. One is Maxxis, considering the Ranchero. I've been running Ritchey ZED Pro's and love the fast rolling center knobs. The Ranchero's are similar. Has anyone had any experience using these tires? I ride in dry rocky conditions (AZ). Thanks!