You have to ask yourself this: what am I using it for? If this is to be a daily rider (i.e. see s alot of street only), maybe a pure track frame (as in a frame with track geometry) might not be for you. You may be looking for a fixed/ss frame but with slacker and more forgiving geometry. In this case, you might look to a Soma Rush (in between pure track and road) or for an even slacker feel (but more comfortable for daily riding), a Surly Steamroller. And there are the IRO's and so on.

The keirin's perhaps might fit you better sizewise but if you're going to end up doing a lot of replacing, then you might as well start off with the right frame.