IMHO beware of all ASIC preorders with shipping by 3-4 months.
Today it looks like great deal to buy xxx GH/s machine, but in few months it's gonna be unprofitable.
Especially if several companies release their 3TH/s devices (e.g. KnC Neptune).
Bitcoin difficulty gonna rise to the moon in the first half of 2014
If you had over 13000$ order 3TH/s ASIC miner, if less build decent GPU miner (not for ASIC-coins ofc).
Today it looks like great deal to buy xxx GH/s machine, but in few months it's gonna be unprofitable.
Especially if several companies release their 3TH/s devices (e.g. KnC Neptune).
Bitcoin difficulty gonna rise to the moon in the first half of 2014
If you had over 13000$ order 3TH/s ASIC miner, if less build decent GPU miner (not for ASIC-coins ofc).