I hope the price for S4 B2 will be lower than S1....
I'll buy 2 S4, but not at this price...
At this price I can't make profit on it...
http://www.vnbitcoin.org/detailcalculation.php?name=Bitcoin_Mining_Rig&startdate=2014-09-26&costperunit=1450&wattperhour=0&gigahazarate=2000&daytoincrease=13&testlopfirst=12&diffincrement=10&bitcoinperdollar=400&electriccostinput=0&begindifflevel=34661425924
and that is without Electricity cost