I use Bebop clipless pedals on three bicycles, and I commute year round in Northern California (where it's cold and rainy half the year, but we don't have to worry about ice). If you like float, I strongly endorse the Bebops--I migrated to them after about a decade of using Speedplay Frogs, and the Bebops are comparable, but better in every metric for my purposes (lighter, cheaper, lower stack height, more float, cleats last longer, etc.). The one downside is that the cleat is not quite as walkable as a true SPD cleat, so if you're optimizing for walking on your commute, Bebops are not the right system.