Keywins with the "track adapter" are the best I've found. You are locked on and no amount of twisting or pulling can get you off that pedal. I use the Speedplay track version for mass starts and I used to use double straps on normal pedals for sprints and standing starts but the Keywins are the way to go now. No tight straps, and a bit more aero. Keywins are no longer just for the Australians. World Class Cycles has them.