Anyone here have insight on the zipp wheel SL hub build? would the Zipp 404 or 808 be a good wheel for training on and race? im 140lbs and ride around 10k miles a season. im trying to decide to go with the power tap SL or a SRM pro, the one before the Dura Ace crank. or any other suggestions on a good strong light wheel, and the pros and cons between the SRm and Powertap sl besides the price.