I will wait around and see when and if the S7 gets released and possibly go for one of them unless I pick up an S5 dirt cheap ...
Yeh the electric cost is the worse .. but I think i am on a pretty good rate within the UK ... I cannot seem to find anything under 0.10 per kWh
The PSU I have at present is a Corsair CX 750
Cheers.
I see, but there is no point in comparing your electricity cost to the rest of the UK... You're actually competing with maybe something like 90% of the miners running on 0.03-0.05usd/kwh. With your 0.15usd/kwh you'd be better off using those 0.08usd/kwh datacenter or trustable cloud which varies. But even using overpriced hosting at 0.11usd/kwh would be better for you.
Alot of people recommend not mining if you're at 0.1+ and that you are, it seem. So regardless what you get, profiting for you will be hard. Good luck nevertheless!