i'm a speedplay zero advocate, using them for almost 10 years

having tried them, i'd put speedplay-specific soles low on my list of things I require....in the "false economy" category....i much higher prioritize using shoes that are comfortable for me, and using the adaptor (which is extremely simple, adds only 3mm stack height, etc etc....)

having said that, i recently talked with speedplay customer service, who related there are currently 21 models of speedplay specific shoes being sold (albeit I think some of those are custom)...so if you choose that path, a little reserach will go a long way...