Is there any advantage to building my .NET application with the 64 bit framework?

We use msbuild to build our .NET application on a server dedicated to builds. We are migrating to new hardware which has 64 bit Windows 2003. I can build the application using the 64 bit version of msbuild found in Framework64 or I can build it using the 32 bit verison found in Framework. Is there any advantage to building with the 64 bit version of msbuild?