If you need a solid but stylish flat, Taupo by Naot is the one for you. It features leather lined uppers which provide breathability and reduce irritation, a cork insole that provides lots of support and cushion, and a solid but not-too-clunky outsole. The cork insole is removable and replaceable, meaning either you can use your own footbeds in the shoe, or replace the original insoles when you feel it is time.
Available at Glebe Trotters.