Thanks for the help but ive also had a couple more questions over the past few days.
Will I be able to play the games that ive listed above (Gears of War, Call of Duty 4, Unreal Tournament 3, etc.)?
And also my dad offered to buy this pc
Buy the iBUYPOWER Gamer Tempest 922TLX Desktop PC and other Desktop computers at circuitcity.com
Will this pc be better to get then buying the parts and putting them in? And also will I be able to play the games listed above with the pc my dad offered.