so.....i want to play DOTA2(ultra settings),ASSASSINS CREED whole SERIES(i dont mind playing at high resolutions if not ultra) and skyrim(high res).......and i want my build atleast carry me for 3 years from aug 2014.......i know that new video cards come every now and then....but please suggest me a good gaming build and reason me why it is a good and ideal one(dont just pcpartpicker please).....thanks.....my budget is around 1000-1200$(with all the computer peripherals like mouse keyboard etc etc)...ofcourse i will buy the headphones and speakers for few extra bucks