My son's track team competes on old asphalt tracks and they are not allowing them to use spikes at meets (even though everybody did when I ran). So, I am looking for a spikeless sprinting shoe for the 100M and 200M. He is using Nike Next Nature at practice, but I am looking for something with the fit and energy return of spikes. I am thinking that a spikeless XC shoe might work, like the Brooks Draft C or the NB XCR7. Any ideas? I appreciate your feedback!