Boat shoes used to be my shoe of choice on and off the bike. I kept having back issues and randomly switched to Sanita chef's clogs. Back problems all but disappeared. The clogs are not so nifty on the bike though and I find Chrome Kursk to be an ideal compromise. Walkable but stiff enough to make a difference on the bike. Vans are way too mushy for me.

For me Kursk was the hot ticket. I still wear the clogs but no back issues with the chrome shoes after several months. YMMV. (the clogs are not ideal on the bike).