I plan to upgrade my pc and iam a graphic designer and internet user, i also willing to play the latest pc games. I already have intel core 2 duo 2.4 ghz processor, 500gb hard disk and 19" lcd monitor.
The lower end graphics card would be a better match for you CPU as the higher end card will over run it a bit. For the lower end card, you could also get away with a less powerful PSU. Something in the 80 plus 450 watt range with good amperage on the 12v rail. - http://www.newegg.com/Product/Product.aspx?Item=N82E16817207018