I currently have a set of cheap cage style pedals. By cage I don't mean toe cage. I mean this:

http://www.jrbicycles.com/storefront...Cage%20(1).jpg

They aren't exactly grippy; my foot has slipped off once or twice. Not a regular issue though. My question is do the studded pedals make a big difference in your commute? I was thinking about this set but nearly 50 dollars seems a bit steep. That's more than how much I paid for my Ultegra SPD-SL pedals!

Nashbar Verge Platform Pedals