Using Visual Studio 10 Professional and wondering if I should upgrade to 2012 or 2013?

Hi,

I've been using Visual Studio 2010 to write C# applications that run as a service, have listeners, and execute PowerShell commands to do system tasks, managing users, creating mailboxes, creating new contact objects, etc.  I'm going to rewrite that code to eliminate the listeners and switch to web services (ASP.NET).  Is 2010 adequate for the task or should I consider upgrading to 2012 or 2013 and what would the upgrade provide me with that I don't have now?

Thanks,

Rob Tanner, Linfield College