When you can afford them go for the clipless. They allow you to take repetitive stress off of your legs as you can point your toes, and instead of always pushing down with each leg you can help the 'pushing' leg by pulling up with the other. My Eggbeater clipless have a bit of a 'float' to them so that you aren't stuck in a position but can turn your ankle in or out a bit to whatever feels comfortable, it isn't as if you are stuck in one forward position.