SPD or LOOK

The battle of the pedals.

Alright, so you may have seen in the pictures from the ride last weekend, I'm still rocking Nike's and toe clips on my new bike. I know this must come to an end ASAP, but before it does, I'd love to have your input.

Should I put on SPD pedals or Look pedals. A bike shop here in town said I should go Look, and that's what my older brother uses, but I've also heard that you can't go wrong with SPD's and both my little brother and Todd use them.

Here's what I've done. I ordered 2 pairs of shoes and both SPD and LOOK pedals and will conduct a little test of my own, but I also would love to hear from people that are actually using the technology right now. What would you recommend and why. The most compelling argument gets bolted on first. Keep in mind, I'm new and sure to fall clipped in no matter which brand I use, and that my end goal here is a century ride, so comfort is as important as functionality I assume. I could be wrong here, but that makes sense to me. Can't wait to hear from you.