Thank you for all your comments.

I bought the A520.
Until they arrive, I need recommendations for a rigid sole shoe that fits this pedal.
The pedal is relatively odd shaped (long, rather than wide) cage.

I've been eyeing the Lake MX165. It has a Vibram sole, which I have on my walking shoes, and I appreciate it.
Anyone have any experience with this shoe?
It looks pretty stiff. Can anyone confirm?

I hope I'm not starting any wars...

Tal.