I use Sidi Dominators and Eggbeater S's for my commute. Works well for me. Never tried SPD, and I never really intend to... EB's work fine for me. I walk just fine with my cleats, they don't hit the ground for me. I might actually suggest MTB shoes instead of ROAD for commuting because you'll spend a bit more time with your feet on the ground and the extra grip and walkability may come in handy.