just to butt into the europe trip planning- if you choose 4 cities connected by train, you can save lots on lodging by taking overnight trains.

also, museum trips are really expensive- my uncle told me it cost him something upwards of US$70 for a day of museum visiting in france. costs are much higher in europe, especially if you're heading to uk/switzerland/that kind of place.

I. must. go. to. Scandinavia. (london, paris, amsterdam, stockholm, helsinki for me!)