graphic card bf3

hey guys, I need some advice on buying graphic card that would play games on medium settings on Battlefield 3 with 1080p or if not then low resolution. My PC components are: CPU= Core 2 duo E7500 2.9GHz Motherboard= Gigabyte G41M-combo RAM= 2Gb DDR2 (will be upgrading to 4GB DDR3 within 4...