i would like to have some s2 mini or something 400-500gh/s and 400-500W 
^go out and buy a few antminers to undervolt. 1TH+ is necessary if you are serious about equipment that will run for 6months+
The S1 was 4.75BTC at first. now its less than 1/5th of that. The S2 will cost 1BTC in only a few months