Hi, I've been researching cards now for weeks and I can't figure out which card to buy. I want the card that will give me the best FPS and quality graphics for around 200-220 dollars, used. I was considering getting the Radeon 7870, 6970 or the GTX 480. My set up is Windows 8 intel I-5 3570k Radeon HD 4890 1g 8g of ram 700 watt power supply, Solid Gear. Thank you.