Need help to select hosting server platform (IIS or Linux) for PHP-MySQL website

Hello,

My website is developed and designed using PHP-MySQL on Windows Server 2003 (IIS) platform.

Now, I am going to host my website on the server so I want to know that

Should I get hosting server with PHP-MySQL & Windows Server 2003 support?

Or

Hosting server with PHP-MySQL & Linux can work for me without any problem?

Please reply so I can decide for what I should do.

Thanks in advance,