Hey, so I recently come into the possession of a Dell Dimension C521. It's a somewhat old desktop. My question is, is it feasible and worth the effort to slowly upgrade it? I don't have the cash to sink into a new desktop all at once, so I was wondering if I could spend $150 or so on a motherboard and RAM, swap that in, then at some point grab a new processor, add a new video card later on, etc. Is that at all a good idea, or am I better off saving up and just getting an entirely new machine all at once?