Re: Videocard upgrade.
Looks like you got a good amount of RAM and a nice processor to go with it. Everything should be fine and dandy once the video card gets upgraded. That's one of the main bottlenecks in a good system.
This is probably the last upgrade you can do. After that, you will need an overhaul to get new technology integrated in there. New motherboard with PCI-express support, better CPU, dual channel memory, perhaps even dual core processors, high performance X-Fi sound card, etc.
*Fact: Microsoft Window's Blue Screen of Death vs Computerforums.org's White Screen of Death. Which is worse?