Yup, I also went with the wider platform of the look type pedal (SPD-SL) when I switched to road shoes.

My commuter has the pedal that is SPD on one side and platform on the other, so I think they are a little better in terms of having a wider platform than the plain SPDs, but my shoes are definitely not stiff enough.

Oh, and in general, Sidi and Nike run narrow. I have never tried PI's. My H (who has a narrow foot) loves his Shimano shoes...so I'm guessing those run a little narrow, too.