yo michael, i think should be cool to see what perf boost you can expect from different compilers in phoronix test suite

i think that you should make a comparison using higly optimized flags if possible of the next compilers

AMD open64 http://developer.amd.com/cpu/open64/Pages/default.aspx
intel ICC
sun sunstudio 12.1 for linux (free download for now i think)
llvm
gcc

thx in advance