Here is an adjusted ROI if you were to get a 3 Module Avalon online today.
At the present network difficulty and an increase of 19% every 12 days your expected return in BTC is 79 before it becomes unprofitable.


The online document can be found
here. It has Avalon, KNC, Bitfury, and BFL top hardware solutions in its estimated projected returns.
Thanks for the info. My calculations were about the same.