There's the SSC U-bin, which is better than the Cree Q5 for replacing luxeons, but the Cree can be brighter. Both can be found at DX. Both are on the homepage.
The sun is so hot that when it burns out a billion years from now, it will explode in a dying fit that will vaporize several planets (including the earth) in our solar system. We're talkin' some big time lumens and color rendition for anyone hangin' around to see it.