Which one will help you most with the career and research you're interested in? If you have trouble between the two potential advisors, compare their most recent publications and your research interests. While friends, family, and interesting cities are important, so is doing research you're not that interested in, and the debt you'll have post-graduation in a horrible economy.
In my opinion, the track you choose should be the one that best helps you further your goals. A professor's age is less important than the professor's ability to help you study what you're into.
Add the other stuff, friends, family, cities, etc., back into the equation if you can't figure out which to choose based on academics and career.