I was shown online the Red Rocket card by a friend last weekend. Do yourself a favour and check the specs at the Red site.
Although not really available yet and probably needing a breakout box that is yet to be speced, it looks really interesting, particularly if you are looking for a setup that will see a lot of Red codec.
And, it is claimed to play 4k. The Kona may have a serious competitor but it is very early days.