Hi KJ. Most top universities in US don't offer a terminal Masters degree and they don't value so much (maybe because they get analyst job outsourced from India). If your aim is research then you should go for PhD. However, a masters from
LSE can make your application for PhD look stronger. To apply to LSE masters you need to have good reco and acad background. You can check the above link for more details on requirements and the programme if it suits you.