anyone tried using these? Thoughts? Light rider

Yes. I have used The race X lite as a cyclocross race wheel for a couple seasons now. It seems a good choice, but have a set of replacement bearings handy, especially if you race in wet conditions. A friend of mine uses the X lite carbon (deep section) wich seems alright but with less spokes on them I would want to be lighter than I am (170 lbs)

I've had good experience with both the race x lite and the carbon wheels.