Sounds like a silly question but I am assembling a new desktop pc and am wondering if my CPU graphics will serve me well enough. I am going with an i5-2500k on an ASUS P8Z68 DELUXE GEN3 mbo. I am not a gamer but will be using the pc for video encoding. If a gpu is necessary, what card gives me the best bang for the buck in the $100-$200 range? Hopefully in the lower end of the range and with two DVI outs as I will be using two monitors. Thanks.