Given the choice which wheel set would you put on your bike, Dura Ace WH7800 or Mavic Kysrium SL's? I just bought a set of the Kysrium SL's that I love, but the bike that I'm looking to get comes stock with th Dura Ace. Any feedback? Do I just keep the Dura Ace and have two nice wheels sets or take a discount and leave them off? Any comments on the Dura Ace would be cool, I already know that the SL's are the bomb.