If you are paying 7 cents a KW/hour IMO it does not make sense to cloud mine.
Buy a Bitmain S3 from kijiji. Or something that has 1w/Ghash or less. Should not be paying more than 80 cents a Ghash either.
I bought 2.7 TH/s in cloud mining and got the C1 and a PSU as a test run at home. Just because of the water cooling so it is livable to sit next to it.
This is what I bought. https://www.bitmaintech.com/productDetail.htm?pid=00020141029135048724z39CYwEQ0684
With this PSU.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817438011
I am a computer repair tech. So I might of got a bit of overkill for the PSU but the price difference was like 30.00 for the other one I was looking at that was just a tiny bit over the minimum requirements.