You are fine, ~650GH delivered by first week of december will make over 17.4BTC in it's lifetime most likely, that's what matters right?
Let me know how much you mine.. according to my estimates, you won't see more than 10btc (13 max) out of a system with 700gh at that time frame. And that's with Fruity Pebbles and Lucky Charms at your side. And by that I mean, the first month. Sure you'll make some after, but it'll dwindle.
It's why I stopped buying any mining equipment from any OEM until they're in stock and reasonably priced. Right now the traders are going to make more than the miners, presuming same BTC investment.
Sad fact.
Then again, isn't it always the traders who are living off the backs of the hard workers in the mines?