kiwitrc: Have a look here and compare to see if Mercury are the best for you I have just left them for Genesis as they offer the best deal for me (yes better than in my case)

Yeah exactly the same thing in my case , plus i hate not having a monthly power option ( just takes it out when it likes and winter prices always going through the roof

I was thinking Genesis for Winter and Powershop for summer ( since none of those companies have contracts)