Great PSU! I have an 860 running my Blades and another for my Bitfury rig (and an 860i and 1200i in 2 of my PCs) I think you could have saved a few bucks though and just bought the 860 (without the "i" at the end). Isn't the only difference is that 860i has the CorsairLink module?
I know, but the 860 was not in stock and waiting time was within 3 weeks. But it was great price 150EUR for 860i.
The Corsair AX PSUs seem to be super efficient. Even when it's running 6 Blades it generates virtually no heat. I run the fan in Hybrid Mode and I've only seen it spinning once this week. But since I just got a Backplane for the Blades, I bought one of those crappy HP server PSUs so it will connect directly to the backplane. But that frees-up that 860 for my KnC when it comes... although it's only a Mercury and it will be overkill, lol.