Road bike pedals (and shoes) are the way to go for road biking, They are lighter stiffer and more efficient and I wouldn't trade them out for anything... on my road bike. But, they are not well designed for in town/commuting/much of anything else. If you need to spend any amount of time walking in them you'll soon understand why, also walking in them wears down the cleats as most styles are not recessed.

Stick with the MTB style pedals, I use them for everything, except dedicated road bike rides.