Where to Go?

Okay, I have a question for those who have been to Europe...which city should I go to? Prague? Florence? Rome? Edinburgh? I have an opportunity to go to maybe two cities after Tunisia, and I have to decide fairly soon...where should I go? :) Any other suggestions? Right now I'm leaning towards Prague and Florence...I've ALWAYS wanted to go to Florence, but I always wanted to go on my honeymoon someday...choices! :)

I'm up for any suggestions you have--IF you've been there!