I think that's a personal choice, and depends on your preferences! I think Harvard has fantastic name recognition, and is recognized as one of the best. Most of my friends who are at HKS are enrolled in the dual MPP-MBA program, and I think it's definitely the best for the dual program if that's what you are interested in. If it's just the MPP, take into account that most policy programs with good name recognition (eg HKS, Ford, Harris, Goldman, McCourt, among others I'm missing) will get you the jobs you want as long as you network, get the right internships and make the right connections. Most of the policy people I've come across in DC went to Ford, HKS, or Georgetown (and other DC schools)...and your salary is based on years of prior work experience + degree, not the school you come from. It also depends on what you want to do- for ex, if you're interested in consulting at McKinsey or Bain, then you should go to HKS. But if you're interested in federal consulting, like at Deloitte, I would choose Georgetown. I think it also depends on the amount of debt you're willing to take on, and where you plan to work after graduation. If you're looking to go back to your home country, then perhaps Harvard is worth it because it'll be more recognized. If you want to stay in the US, Georgetown is very highly regarded as well and its DC location is a huge asset.
So Georgetown wasn't ranked as highly in the 2012 rankings (which was the last time US news did policy school rankings) because it was still an institute at the time, and not a separate policy school. McCourt was GPPI up until Oct 2013, when Frank McCourt gave Georgetown a $100M donation to establish the McCourt school. The creation of the policy school & the additional funding (there was a lot of $$ donated to create new institutes at the beginning of the year in addition to Frank McCourt's donation) will no doubt increase McCourt's ranking in future US news reports. My cohort is the first official class of the McCourt school and the funding and creation of the new school has attracted a lot of very smart people and big names to supplement the already-great faculty - George Akerlof joined at the beginning of this year. It's a lot newer than other policy schools, but the administration's looking to create the best policy school they can, and with the means to do so they're doing a lot of great things and it's an exciting place to be.
It was a concern initially when I was making a decision, because Ford is so highly ranked and I was worried I wasn't making the right choice. What helped me was to look at the job placements and check out career services- looking at those alleviated my worries because McCourt has phenomenal job and internship placements. I also talked to a lot of people who told me that McCourt is highly regarded for policy analysis and known for its quant rigor, and they were right. And McCourt is part of Georgetown, which carries its own weight in name recognition.
There are a lot of Ford grads in DC though, and I think other policy schools might be better if you are 100% certain you want to be in a specific region; for example, if you want to work in TX, I would say go to LBJ or if you want to work in California, Goldman or Price. I chose Georgetown because I like DC and also because its reputation is solid enough that it would be recognized anywhere!
Re: internships & jobs- you're correct that US gov't jobs aren't available, but most of the international students here are interested in development and economics, etc so they're looking to be at the World Bank, think tanks, other NGOs/non-profits, and some are looking into consulting for the summer. Interning during the year is really difficult with visas, etc for international students, so most of my friends have taken RA jobs for professors or are doing things at Georgetown. While it's difficult during the year, it's not impossible- I do have a couple of friends who are working at the Bank this semester and worked with supervisors & McCourt to sort out the visa situation!
Hey Francopan- I'm not sure what you mean by the Columbian school, but if you look at the admitted student site, you should find a contact at admissions for funding & scholarships or an associate director for admissions that you can contact with your request, which is what I did. I did my request via email!