For commuting use, may I suggest some MKS GR-9 platform pedals? These require toe clips and straps but have a nice flat platform. If you are wearing sneakers, or similar shoe with deep tread, you will probably appreciate these pedals. The typical cage pedals don't I use them on my commuter with deep tread shoes and couldn't be happier.

Harris Cyclery and Rivendell both sell these. $39.99 at Harris. You'll need toe clips and straps as well.