Hi! I've decided to buy my son the parts to build his own gaming PC for Christmas...looking to spend $400+-. Can anyone please help me get the most for my $. I'm a pc user but know nothing about the internal parts lol! Thanks in advance for any help! He plays COD type games...I've been looking through the forums but most I've found are pretty old so far. I know he wants a case with lights and I'd like a decent memory and speed. And I'd like to be able to add Microsoft word for school related use. Thanks so much!