I currently have a Galaxy GTX 660 in my build. I'm thinking about selling my card and getting a new or lightly used GTX 670 or GTX760 for around $200-$250 range. I get around 30-35 FPS at 1080p Ultra in most games I have. I would like higher FPS at this setting in current games but I'm fine running at 720p for a lot higher FPS. My main concern is for the next generation of games. I want to be have a card to at a minimum run those games at 720p around 50-60FPS. Would it be worth it to upgrade to a 670 or 760 from my GTX660? If so, which one should I get?