Hi, I have never used any type of clip in pedals before, I have been looking around online and the Crank Brothers pedals seem to be nice with the 4-way entry business, are they good? I have mostly been looking at the Quattro SL, Candy C, and Eggbeater C. Do you have any suggestions? I am also noticing that there is another type of eggbeaters and candy with "SL" rather than "C", what does that mean?