This is a very long discussion on Good MAT institutes in the country. Please do note that the thread is active since 2004, so you may need to check some of the later discussions for information relevant this year.
Beyond this, you can check out the section for MAT, where you can get all your queries answered. You may want to spend time browsing this section if you don’t find an answer to your queries, you can post your thoughts and someone will get back. Now that you are done with MAT, all the best for your business school admissions.