Threading a fork steerer is a PITA, labor intensive, and expensive (unless you know how to do it and have the tools to do it). No shop likes to do it, and many don't even have the thread-tapping tools to do it. If you want to run threaded on your Kilo, it would probably be more cost-effective to buy a threaded fork w/ the appropriate length steerer. Threadless in your case is definitely much cheaper and much fewer headaches.