I'm looking into buying or building my own PC. Right now I just have an HP laptop that I purchased 3 years ago with Core 2 Duo. I used to be on the up-and-up with processors. I knew what was good, what was better, and how much better. I've been slacking in the PC news past 2 years and now I know very little. I remember Dual Core came out, then Core 2 Duo surpassed it - which is what I have. Now I see i3, i5, i7 - how much better are these.. and respectively, how much better is i7 than i3? Are the primary processors Core 2 Duo and the i Series? Or am I missing more? A list of what from worst to best would be helpful. Just trying to learn more so I spend the right money when buying or building a new PC. I would like it to be strong enough to run SC2 like a knife through warm butter.