If you opt for the proprietary driver, it will install a couple programs that you may find very useful. nvidia-xconfig and nvidia-settings. The nvidia-xconfig program will write an xorg.conf file for you. The nvidia-settings will put an icon in the tray. You can set up dual monitors, adjust the gamma, select the resolution and save your settings to your xorg.conf file.
I'm not familiar with your card. Try the nvidia site to see if you can use the regular driver or need a legacy driver.