Re: Europe travel question
I visited Vienna for a week last summer (Klimt's 150th Anniversary) and had a great time. We visited Paris a few years ago and stayed about 4 days (not enough time). I frequently visit Amsterdam and stay a week at a time. All three are cities I really enjoy and will return. I like vacations that are relaxed so that I can recharge my batteries. I don't want a 10 country trip in 3 weeks.
Therefore, I would recommend reserving a place in each of the 3 cities for a week. All three cities offer a lot to do and there are opportunities for day trips if you run out of things to do in the city.
Have a great time.
p.s. a night or two in Bruges will also add a really nice side trip.