Someone please HELP! I just purchased my first bike and I am completely lost on the differences between clipless pedals and what shows I should purchase. I was recommend to purchase Keo Easy pedals but I don't know the difference between Look Keo Easy regular which starts at $80 or Keo Easy Classic Pedals which starts at $120? Also what shoes should I purchase with them? I am on a budget and I don't want to exceed $80. The bike I have is a Cannondale Six 6.