I will second the mention that street shoes are cheaper. Right now, I'm wearing shoes that were $25. My bike has cheap plastic clips and straps that I got for like $5-$10 I think. The pedals were on a bike I found in the dumpster. So what, you think my bike's ugly? So I don't pedal as efficiently as you? Well, at least I don't have to worry about messing up a shoe and pedal system that's worth more than my whole bike.

Cheap wins!