That's exactly what am trying to get away from-tap dancing from a switch to the wah and back. When you sing lead and play lead, you can't be looking down at your feet that much aiming at switches like you can if you just play guitar , I want to step on the pedal and go.
Yeah that is why I like the bypass at stop and I don't even sing lead!, but I think for you the Mission Pedal would be a good option, it acts just like a real Wah pedal with the toe switch on it. - That being said you should try the bypass at stop option first, it might save you 150!