I would max all settings. all of them. Except the sound stuff (eax and related) because it looks like you are using onboard sound. If you notice any strange popping sound, get a Creative sound blaster audigy from newegg.com, its only $23.00. But if the sound runs smooth already, dont bother with a sound card.
Intel Conroe e6750
SLI EVGA 8800gts KO's
4GB Patriot DDR2 800mhz
22" Widescreen Sceptre LCD monitor 5ms
OCZ 700W psu
320gb seagate w/ perpindicular tech.
Creative SB X-Fi Fatality
Thermaltake Armor: Extreme Edition