If you don't already have a standing pre-order, wait for them to come out. The first ones with orders in, will be the first shipped, and they will be the ones to make a killing on mining with ASIC. That $160 Jalapeno will be just like a $160 7770 now, making pennies/day and decreasing. You may never recoup initial investment.
I promise that in the first hundred pre-orders, there will be many, many, many Th/s added to the global hashrate making it difficult for the later orders to make money.
I think you're wrong. The time to recoup the investment will be the same whether he goes for a jally, a little single or a single. The prices of the products are pretty much proportional to the Hashing power you get.
I agree on the scale of investment compared to ROI, I'm meaning the amount of orders in front of an order placed today as opposed to 5/6 months ago when pre-orders were announced. The hashrate could double by the time his unit ships...
There are some very large miners that got on the list on day 1. If they get theirs, potentially doubling (or more) the difficulty by the time he gets his, he'll be in a bit of a bind.