Future path Guidance for admission

Hi, To introduce myself, I have completed my graduation in computer science few months back and presently working in American Express, India as Business Analyst. Some of highlights of my career are 1.India’s First Solar Car: - Won 2nd Prize in South Africa Challenge, Got selected as Green Project in Copenhagen Conference. 2.Teach India Program: - Educating students in nationwide schools and colleges about solar energy, green energy and working on projects like Solar Lights, Solar Car etc. 3.Indian Representative in 20 member delegate meeting with IEEE US president. 4.Representing College in various National meets. 5.Neighbourhood Project: Educating, supplying basic amenities and providing employment to poor children and people. 6.International Internships in UK, Paris. 7.Leadership Roles:- Workshop Manager, SIG Manager, Media Manager, Web Manager, organizing various Mega events 8.Academic Achievements: - Ranked 80 among 800,000 students, Winner of aptitude Competitions, positioned in top 50 in various Science and Mathematics Olympiads. My question is :- I have got an opportunity of working as Research Engineer. I am confused whether to take this international work experience opportunity where I get to work on new algorithms in industry, optimizing performance related to image processing and computer vision. OR To remain with American Express learning about service industry working, risk analysis and learning about co-operate culture in a big, old and renowned company. My future aim to do an MBA from Wharton/ Harvard/ MIT Sloan/Kellogs work in finance industry for next 5-10 years and then set up an industry in computer vision or Solar Car production.