Really risky to buy in when there's no solid info about the Gen2 chips.

Moreover, before buying, make sure you have considered the risk that Cointerra may be successful in their 22nm chips and sell hardware at $3/GH on Jan 2014. I believe AM will survive next year, but not likely to have the same advantage as this year. You could look at AM's price at early this year when they were clearly the first ASIC miner, and then predict its price when they don't have advantage anymore now.