I know full well how inadequate my current graphics card is for a game like CoD 4 and I know allllll about the alpha blend error. I just want to know which is my best bet for an upgrade. I have no PCI-E slots so should I go with a Radeon or Nvidia upgrade for an AGP slot? (Please have your answers take into account that I have a very limited amount of money for this upgrade - about 100 dollars) and should I be getting it from a store or from eBay? I just want to know which will give me better quality for a low price AND that will support separate alpha blend.