i use spd's on the track bike i commute on and i'm not too happy with them cause-

1. i'm big (175lb) and a strong sprinter/torquer and, even with the pedal retention as tight as possible and my bike geared at a healthy spinning 44:17, i can pull out of the pedals on a quick start (annoying) and i can pull out when braking especially hard (scary when your feet are your only braking mechanism) i would never even consider using them on my "for the actual track" track bike, since at 49:15 i wouldnt even be able to do a slow start without pulling out of the pedals.

2. they have no float, i get patellar and medial tendon pain in my knees if the cleat is even a milllimeter off perfect rotational alignment whenever i get a new cleat or switch shoes or something, and being a sprinter i'm especially nervous about the knees since i would like to still be walking and biking after age 40 without multiple surgeries.

however, i am happy with the ruggedness of them and with the volume of riding i do and the massive comfort difference and better energy transfer from going clipless i could never go back to clips and straps.

i have spd's on my mountain bike and road bike too so they're all i ever used. what pedals does everyone else use on a fixie?? any feedback on look, speedplay, time, eggbeaters or those track specific pedals?? any other recommendations???

most importantly i need something super strong, so i can sprint and brake with my mind at ease, also important is a little float for the knees and they need to be able to take a beating cause i ride 50+mi a day and i frequently have to walk 20-30m across concrete and i dont want to waste money on stuff that will need to be replaced all the time.

thanks in advance