Wait until you start to answer those essay questions. working experience will provide you a lot of story to tell, do you have any attractive story?
I am sure some MBA program in USA will love to have you to boost their rankings. but I am not sure whether you can make it to top30. my advice to you, since you are so smart (getting 740+), if you can work for at least two years for a decent company, sky is the limit for you.