My boys (14 and 12) are running CC. They're both pretty good. My oldest is a freshman this year. Last year he practiced with the HS team and was already faster than all but a couple of the seniors. He's been running in Merrel Trail Gloves, but his shoes from last year are getting too small. Any other minimalist shoes anyone can recommend? He probably needs spikes as well, but he'll need something else to practice in first. I've seen some interesting ads and reviews for the Xero Shoes. Anybody have any experience in CC type environments?