Check it out, LLVM scores:
http://www.phoronix.com/scan.php?page=article&item=llvmlinux_314_clang&num=1
LLVM and Clang were my original PowerBASIC alternatives. However, on Windows, it is not as feature complete as GCC is right now. For Linux and Max OS it is much better. Eventually (if I ever get back into the programming groove!), I will switch back to Clang once it gets better supported on Windows.