I would not get vista because the vista os uses about 1/2 of the pc's mermory with out anything open. IF you can get XP pro get it. XP pro is the best windows os for games right now. This laptop will give you beter performance if you get windows xp on it. That is a fact. See for yourself:
http://www.tomshardware.com/reviews/...ista,1531.html
IF you need DX10 see this thread before getting vista.
http://www.techsupportforum.com/gami...-works-xp.html