Depends on how good you are, and if you think it will help you. At my track, there's plenty of racers going clipless, and plenty with platforms. Personally, I use a good set of pinned platforms with a Vans-style clipless shoe that has a stiff sole and rubber bottom. Good grip, no slip, but I don't need to worry about unclipping when things get sketchy. I go clipless on my MTB, but I can't afford to get hurt on the track.