Can someone out there who is familiar with both these video capture devices tell me the difference? I know that DX2 doesn't need a power supply, that it just relies on USB power. Aside from that, i would assume they are the same unit. Am i right?! I have the original DVD Xpress, and it's been great, aside from computer problems causing it to malfunction, and i am just wondering if buying the DX2, or any of the newer models, would be feasable.