Hi Abd,
Thanks for writing in and congratulations on having so many choices. Since I do not know much about your background, your goals, and what you are looking for in an MBA program, I cannot advise you as to which school is best for you. I recommend comparing your post-MBA goals against what each school offers in that area, and examining how strong the school’s job placement record is in your desired field. The schools’ admissions offices should be able to put you in touch with recent alumni in your desired field to help with your decision.
In regards to your second question, each ranking site uses its own set of criteria when calculating rankings, so there is no such thing as an "accurate" ranking, since each site made a subjective decision of what to include in their rankings formula. I suggest looking across several sites to get a general idea of where your target schools are ranked, and also looking at the data within the different subcategories used to compute the rankings and tease out the information that is important to you.
Best of luck with your decision!
Daniel Richards
mbaMission
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