Wait till you hear this I have a pair of specilized shoe I just found out that I can use them on my hybrid with the $80 look pedals but I can not use them with my road bike look $150 pedals I have to use the sidi which are 39 size 6. I can now clip out like a peice of cake on my road bike. With the smaller size show I could not clip out that easy. I even took it to LBS. So I am going to ride with both pair. When I ware them out I will then get a new pair.

Thank you for all the help. I did not Know about the swelling part.
I will keep that in mind on the smaller pair. My LBS is real good about letting you try stuff. Lelsie already has given a good idea of a good road shoe for me when I have to move up.