If it's a two mile commute, there's no need to overthink things. I would just get a pair of these and be done with it:
http://www.amazon.com/Avenir-Alloy-P...dp/B002BW3HKU/

Toe clips you can remove, reflectors, reasonably lightweight, won't look completely out of place on a road bike. They're similar to the Wellgo pedals you found at REI, but less expensive especially considering toe clips are included.