1. There is no MiniRig that does 40Ghash/s. It's called SC Single.
2. Your 40Ghash/s will be worth not much once the difficulty goes up so don't get too excited about mining with it.
sorry for the wrong name of the product. I meant SC single of course. I'm counting on the difficulty to go up by 15-20x, who knows, maybe more. It will still be profitable though. I'm just trying to make a point that lot of people write bad things about BFL, but it's a lot of baseless accusations.
I just came to bitcoin couple months ago and I really like the idea and I want to get a piece of the cake with the mining evolution that's going on right now...