Speaking from experience, the BK is a nice frame, but way overpriced today. Their really isn't much of a difference from a Kilo. Its perhaps a bit stiffer with somewhat more track-appropriate geometry, but the tubing isn't exactly high end. In the end, I don't think you are going to notice much of a difference.
The Godzilla looks nicer and maybe has better tubes, but for all practical purposes, its just a more expensive version of the same thing. You could do much better for that amount of money IMO.