I am more asking for opinions on difficulty I guess. I just don't know enough to speculate. Assuming that BFL delivers then we know that ASICs will hit and the difficulty will surge. I just don't know what is a reasonable guestimate for it.
Like I said I am not concerned about the exchange rate, other than the fact that it is so high I wouldn't have to part with that many coins to order the device.
However if it is going to take years to even generate the coin back then it isn't a good investment.
If they deliver tomorrow, and BTC goes to $10000 it is an AWESOME DEAL because now you are rich.
If they deliver in 6 months and BTC goes to $10000 it is a TERRIBLE DEAL because you could have bought BTC instead.
If they deliver in 6 months, but the product is crap and burns out after 2 weeks of mining because they are amateurs and have no idea how to build complex electronic equipment it is a TERRIBLE DEAL
If they deliver tomorrow, but the product is crap and burns out after 2 weeks of mining because they are amateurs and have no idea how to build complex electronic equipment it is an ever so slightly less TERRIBLE DEAL.
Of course, the elephant in the room is that they may never deliver at all. But you declared that the elephant is not to be considered because it is large and gray.