if you're looking to save money and want to go with clips and straps instead of the retrogressions, try buying nylon clips instead of metal ones. They work just fine and are usually half the price.

http://www.treefortbikes.com/product...ouble-Toe.html

those are just 9 bucks plus shipping. I just googled that in 10 seconds so you may be able to find it even cheaper or in a set with straps.