I have no growing experience at all yet and can't recommend any of the products on the market from personal experience, but I saw your post and I was speaking to someone from Advanced LED on the phone today, where their products do incorporate Cree diodes:
http://advancedledlights.com/3w-led-grow-lights/new-diamond-series-xml-10w-cree-xml/Like I say, I can't personally recommend anything, but I think this is an example of what you are talking about. Guy I spoke to was very helpful and generous with his time considering I'm not even ready to buy yet. I'm looking around for something good, but a lot less expensive than the Apache 600, which is way out of my price range. So far in my searches, I think the Advanced LED and Budmaster II products jump out at me, simply because they use Cree/Osram diodes. Maybe that makes me a brand whore. So be it!