Arch or Flow rims? Building a Giant Anthem X 29 for general XC trail riding, some of it could be technical, maybe a few races but that is secondary. Me: 6'3" and 210-220lb. Don't generally have much trouble w/ wheels but I want sufficient durability to not worry about the wheels daily. Is the Arch enough? The Flow just seems farther into the All-Mountain area vs. XC. Thoughts? Thanks for any assistance.