That is entirely up to you, a card roughly half the price of the 7850 will perform very well at the 1680x1050 resolution and may not have much issue with your games at 1920x1080 either. So if there isn't a real plan to upgrade the monitor for a while (6-12 months at least) I'd say get a 6850 or 6870 or something around that price bracket as it should do very well at your current resolution, then think about upgrading to whatever the best bang for buck card is of the next generation. [also if you don't mind lowered settings on select titles, you could probably get away with an even cheaper card, save some more money for the future]