Unless you are going to be racing, why would you need a shoe with stiff soles? Modern cycling shoes, be they for the track or road, are designed with stiff soles for cleat support. I have an old pair of Duegi Road shoes for clips and straps, and they have a super stiff sole because of the presence of an adjustable slotted cleat. I simply prefer nice comfy sneakers when riding with pedals with clips and straps, be they Adidas, Reeboks, Keds, or whatever.