Got an offer for one used for 70 dollars from a guy I know. Currently using the quite outdated HD 3870 since I had to sell my main rig. Do yall think the increase in preformance is worth 70 bucks? I know its faster but what I havn't figured out is by how much. Closest i can find is 9800GTX vs 3870 and the 9800GTX/GTS250/GTS450 are similar with the 450 being the fastest. So worth 70 dollars for a boost, or will I not notice it. Im using an E6750 @ 3.4 and an HP 1600x900 LCD.