So I want to upgrade to something really good, but not extremely out of my price range, which is like $350 to $450. I've been looking at the 580, 670, or 7870. I don't know a whole lot about video cards, I was just going off of some benchmarks I saw on the web and some youtube videos I saw. I want some opinions from some people who actually know what they're talking about before I splurge on a bad card lol. What do you guys think?