I'm building my first computer. I've received some great help from this forum already and I think I'm nearly ready to buy the components, but I'm still not completely sure about the graphics card I should get. I don't mind playing games on lowered settings and I'm not a massive gamer, so initially I thought I should get a HD7770. However, I want the graphics card to last maybe 4 years, so should I get a more expensive card? The current proposed build is listed below along with other possible cards I've looked at. Any suggestion/opinions would be great.