Let me preface this with saying that I am a young bitcoin miner, which means that I don't necessarily have that much cash to throw around. I have been mining or otherwise following bitcoin for over a year now, and am thinking about getting an asic miner. I was looking at the AntMiner S1 asics and had a couple questions. I was looking at buying two AntMiner S1s and a power supply for $1000 (suing all of my money) and mining with them overclocked to 200 each. I know that when I plug all the data into a mining calculator ( http://www.bitcoinx.com/profit/ to be precise) that it says I will break even in about 78 days. I was just wondering if there are any hidden problems (aside from bitcoins fluctuation in value) that would prevent me from making my money back. Any response is greatly appreciated, and I thank you for your time. May the blocks be ever in your favor!