These are the available options for video cards at hp.com. Which should I choose?
256MB NVIDIA GeForce 9300, DVI-I, VGA adapter,HDMI
512MB NVIDIA GeForce 9500GS, DVI-I, VGA, HDMI
768MB NVIDIA GeForce 9600GS, DVI-I, VGA, HDMI
1GB NVIDIA GeForce 9800GT, 2 DVI, HDMI adapter