+1 re. SPD-Rs. These are great pedals for track sprinting and road racing, but not great for leisure / performance road riding.
If you are into road riding and are considering Looks, you should also consider the new Time pedals. In my humble opinion these are all-round better. The pedals are just as easy to click into and out of as Looks but cheaper and particularly at the lower end a good bit lighter. The cleat in particular is very robust with metal contact parts and walking-friendly rubber pontoons rather than the Look cleat which both wears easily and is slippery.