As I noted earlier, my Vista Media Center experiences are not that good to write home about. But things are changing. I was finally able to narrow down the problems to the NVIDIA drivers used with my graphics card. The latest NVIDIA drivers for Vista have vastly improved the performance on my pretty low end graphics card. The stutters have almost vanished. The one place where video still stutters is when I expand my 4:3 SDTV feed to the panaromic 16:10 mode using the media center’s zoom functionality.
The audio driver for my motherboard is still in beta. Once a final version for those drivers are available, I think all the problems will vanish. I am saving some money for my Home Premium upgrade.