Hello I have a Dell Dimension E521 and I upgraded my RAM and its slot it a DDR2 PC2-5300, also my video card which is a Radeon™ HD 4650 Graphic Card. Then my processor died, I would like too upgrade it but from what I know no one makes processor for it any more. Should I get a new motherboard and processor or a new computer and if a new MB and processor what should I get thats compatible with the video card and RAM I bought. If I need a new computer what is the best one for under $500 and for a online gamer? Thank you for your help.