I replaced my pedals with Wellgo SPD. My LBS had them for under $30. I already had a pair of Shimano SPD mountain biking shoes, and they work great together. I would recommend not spending a lot on the pedals and shoes until you have tried used them for a while. If you find you really like clipping in, upgrade to better components, if you find you don't clip in as often or hate them, you didn't spend that much.