Hello i want to build a new system. My budget is $700 tops. I would be using an LCD screen capable of 1900x1200 resolution; but i play games at 1024x768 resolution. I will be using it for general use (internet, office, movies, music, matlab, maple, etc...) and do some gaming. I would like to play Fear and Crysis at full settings. I already have a monitor, mouse, ATX case, sound card and windows xp (might upgrade to win 7).