I want to watch high res and HD divx and DVDs with my PC on the TV. I might also want to browse web and view pictures just to see what it's like. My PC is a Dell 400sc with P4 2.8GHz HT, 1GB ram, 2 dvd burners, 2 hds, Win XP Pro and everything else on it is stock. Can I turn it into a HTPC by just buying a NVIDIA PureVideo Decoder and decent agp card? Or would I need to buy additional stuff like CPU cooler, fans, new power supply, etc? Is my PC is too old for what I want to do?