I think Insead and London Business School are your best choices. Take a look at:

GMAT Tiers - strong schools for your GMAT www.find-mba.com/board/27082

How to use LinkedIn to find the best school www.find-mba.com/board/33571

Dear Duncan,
Thanks for the help, but for me the course fee is also an issue.....as it might get difficult for me to arrange huge fees.
I am from india, so is there any way to sort out that issue??
What are the chances of getting a scholarship...and which are really good schools witha lower course fee??

That's rather hard. Your work experience isn't in finance (I think.. maybe it's in corporate/project finance but it doesn't sound like it) and background isn't interesting or rare enough to get a scholarship to cover most or all of the costs of an MBA at a schools that feed into the roles you are talking about.

Read the article about scholarships liked on my profile page. Perhaps you should be looking at masters in finance, which would be more affordable, or looking at the career options that flow from the sort of schools that either you can afford, or which might offer you financial aid?

<blockquote>Dear Duncan,
Thanks for the help, but for me the course fee is also an issue.....as it might get difficult for me to arrange huge fees.
I am from india, so is there any way to sort out that issue??
What are the chances of getting a scholarship...and which are really good schools witha lower course fee??</blockquote>

Keep in mind that if you did a program like LBS', you'd likely make back the money you invested, relatively quickly - the high return on investment of ranked MBA programs usually means that it's worth it to do what you can to pay for them.

Maybe read this article?
http://www.find-mba.com/article/810/tracking-down-the-funds-how-to-pay-for-your-mba