RE: Windows 7 v/s Windows Vista
I would say Windows 7. Normally i would say it's what suits you but in this case, know for a fact that Windows 7 is much less frustrating than Vista. It doesn't crash (as much), its much faster, better UI, comes with more updated preloaded software. Its just better in total. Believe me. Google it
Most of the compatibility issues are easier to solve and believe me its more compatible than vista can ever be. And I think... it uses the less system resources when compare to the windows Vista