I would suggest one of the Shimano platform/spd or a Shimano double sided pedal (M520's can be had on ebay for $30). The quad-sided crankbrothers also come very highly praised from many. Notice I said Shimano or Crank Brothers. For your first pair of pedals, do your self the favor and go name brand. I had Wellgo/Performance/Nashbar pedals as my first clipless and now looking back wish I'd spent the money on my M540 double sided SPD's off the bat. Would have been a lot smoother learning and going early on if I had.