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I guess 650 kWh for 2 months would be more accurate for me.. and that includes heating and cooking.
When someone has to get new electrical wiring in the house I can give you one advise: make sure you can switch off most power groups/outlets from the main board. In my case it will be less than 10 years before I saved the initial cost, even when I only take the kitchen into account.
I do plan to build a new desktop, but that one has to be power efficient and should last at least 6-7 years. It's main purpose will be for more demanding programs like editing photos, running virtual machines, .. When I want to surf, chat, mail I will still use a cheap laptop.