You have a decent profile and a good corporate exposure. As per your profile and area of interest I would suggest you to target Duke, SMU Cox, UNC Kenan Flagler, Emory and Rotman B-School where all you can apply along with the the list of b-school you have mentioned below.
The Business Schools you have chosen are excellent but I will suggest you to apply few more which I have suggested above as they have good acceptance rate and employment record. Also get in touch with the alumnus of B-School which you are targeting to know more about the B-School admission procedure.
You would need to cleverly prepare yourself for questions like the reasons you want to switch from IT to management, your rationale behind applying for a specific B school, so on and so forth.
The next step for you is to focus more on your GMAT and application essays, recommendations for these Business Schools.
Please visit http://tinyurl.com/cnpsl4a
to see more about online Essay Evaluation and Interview Preparation.
If you happen to be based in Mumbai, you can attend a MBA workshop by the alumnus of ISB along with alumnus of various top global B-Schools during the dates mentioned in this links http://tinyurl.com/cjy62uh
Feel free to post any other query or concern that you might have.