Depends. They could all likely be fast, it’s going to largely depend on what sort of tires you will be running. We run a very hard tire (Duro) in our club, and that seems to favor a softer chassis. If it’s a softer tire, you might be able to get away with a stiffer chassis. The OTK chassis (FA Kart) seem to respond well to the LO206 and a hard tire around here.