University of Edinburgh is the best amobgst the lot as ranked 13th in world for MS inro technical fields.
The ROI is fantastic with Average salary of 60,000 GBX.
The opportunity are fantastic although visa issues remain stringent in UK.
The next best alternative is California State University for which Signal Processing is cinsidered decent branch and gives ample of opportunities for grooming and securing top jobs.
Cambridge University is one such alternative for you but provides Machine learning course and is more adaptable for CS Specialized students.