I am an inch shorter than you and maybe 15 pounds lighter on a light day.

I have the Ultegra PD-6620 SPD-SL Pedals on my Road Bike and Tri Bike, and I have the PD-M324, which are SPD pedals on my "Hardroad" which is my Hardrock with 700C rims.

I prefer the m324s for general bombing around town, or commuting, but if I'm going to lycra it up on the road or, god forbid, race, then I'd really recommend the wider platform and stability of the SPD-SL pedals. You don't have to spend up on Ultegra, you can also get 105 level pedals.

If you want to walk any distance in the shoes, then SPD is the go.