I was thinking of leaving the basement unfinished for now, but I was going to plan out what I would eventually want (to make sure everything fits). I know what you mean Arjen, it is easy to go overboard when you can pick what you want. Like how much cable is enough? But I look at it as an investment.

How does it work, when you build your house, do you have to find all the different groups (architect, main contractor, electrician, plumber.....) or do you find one person, and he subcontracts the jobs. How does payment work, do you pay the job up front, in one sum, or does the money get given as the job progresses? Are there any good on-line resources that might help with layout, there are some things that I am still not really sure about. And (I agree wiring is not one of them) but is there some places (like leaving the basement unfinished for now) where you can save a bit of money, without it affecting the final outcome, or meaning a lot of money to redo it right latter (like cabling)