Is MSVC++ the only C++ compiler that is worth using for Win/OpenGL programing?
NO!!! 
You can use any compiler for openGL as long as you have the librarys set up correctly. The compiler shoule be what you are used to.
I myself use a multitude of compilers from MSVC++ to Borland, it all depends on what I am triing to do and how portable the project needs to be.
Of course if you don’t use MSVC++, you can’t use MFC’s, but if you use Glut correctly, you don’t need them.
Roach 