Years ago I started riding with Speedplay Frogs because I heard they were good pedals and offered a lot of float. My knees aren't great and I liked the extra freedom. A couple years back I upgraded to Speedplay Zeros for basically the same reason plus the Zeros had coffee shop covers which is great because I am a big guy and I can trash cleats pretty quick walking around in them. I realy love how the cleats/pedals work but during my commuting etc. the cleats get worn down and the cheap metal and plastic break. I need a new pair as again they broke once more. Probably my 8th pair over the last 3 years. They retail for $40 a pop so it's not cheap.
Since I am a big guy I am not really overly concerned with the weight of my equipment. When I first started cycling I was wearing mountain bike shoes with clipless pedals and didn't know any different.
So my question is, is there a mountain bike shoe, or a road shoe with a good rubber build up around the cleat base, that will accomodate Zeros...or what other options should I consider? I guess I should go back to mountain bike shoes for my commute then maybe keep my road shoes for weekend rides. I'd rather not have to switch pedals out all the time. I don't know. Just looking for some opinions on the subject.