I remember KC was the first to come out with HID race lights and since then HELLA has dominated the market. How do the KC's compare? Also, I have heard a lot about the new LIGhtforce's (integrated ballast, adjustable beam). Some say they are brighter too, but I think the adjustable beam could be a big selling point. Anyone tried all 3 of these or 2 of the 3? Which is the best?