Thanks for the help, folks. I ordered a pair of XXL nashbar cheapies--they look absolutely hideous in the catalog next to the pretty Pearl Izumi pair--and will let you all know if they work out.
philosoraptor--I don't mind the wet and cold during the ride, so much. What I dread is when I have to put on the still wet shoes at the end of the work day for my ride home. We have had such torrential downpours that even after many cycles under the hand dryer and spending the day stuffed with newspaper, the shoes are still wet.
BTW--do you have clipless road shoes? I have NEVER seen 52s for the road.