Upgrading an old computer

Solution
I'm not sure if anyone would be interested in my current ones, i could try.
I think i could stretch my budget up to those numbers though since i'm an ex-console player and still have the console hardware waiting to be sold. Those parts seem to be just great for my desired gaming needs, thank you!

Though i am not quite experienced at computer technology so i was wondering will i lose my OEM windows 7 activation when changing the motherboard or is it stored in the hard drive?