Looks like about $49 a GH on average.
Buying Bitfury at $20 per GH
KNC at $15 a GH
I'll offer BTC11 per single.
BitFury is running in a limited capacity. You order now, and you can't expect your order until October, at least.
KNC barely has prototype pictures, and isn't scheduled to ship until November.
ASICMiner blades are the only other hardware you can get, and they're $53/GHs, while using more power.
11BTC is a little low.