re: Please Help Us Decide - Europe

That's a short trip, and with all the cities you are wanting to do, you'd be burning nearly 3 days with travel alone (think about how many hours it takes to packup/checkout of accommodations/get to airports/go thru security/leave airport/get into the city/check-in). You'd be stretching yourself very thin, and not be able to enjoy things. Kids will be annoyed and tired of having to do it nearly every day.

That being said, I like doing radically different places. So London vs Spain is fun and both very different. Spain will also save you a HUGE amount of money.

Once you've decided on which cities you'll hit up (seriously don't do more than 3, 2 preferred) come back and let us know and I'll start throwing out some recommendations