The only reason for me to consider Bitstamp is their exchange price, which seems much lower compared to any other option out there.
Just so you know, there are fees levied by your bank towards INR to usd conversion and wiring the money, and then some fee charged by bit stamps bank to accept the wite and process it. Make sure you know how much these cost before you send across the deposit.
also all of this will be applicable when the bank actually agrees to send the money across. as an ordinary indian citizen there is no legitimate reason for you to be sending money across to bitstamp, as it doesnt fall in any of the categories allowed by RBI for remittance purpose. (categoreis include education, medical reasons, etc.)
However, as a business entity you may send money across, but i believe for that you need an invoice or something of that sort from them that you are transferring money for a purchase. However, how you will show it as an import because if the money went out, you need to show something has come into the country.
The only legal way as such to send an unlimited amount of money to anyone outside india is by credit card.