Hello, I have a couple of questions. First, I purchased the above listed computer for 500.00, new and in the box. Is this a good deal? I couldn't seem to find anything else close that was new, not refurbished. Second, I have seen this computer listed with an ATI Mobility video card, but mine is the standard on board 4500. Does anyone know if this computer is easily (if at all) upgradable to an independent video card?