I was going to suggest Bottled Video (
http://www.bottledvideo.com) - they have great high quality HD stock footage, and it's all completely free to download and use.
I just checked and they're having some issues right now. Looks like they're expanding their site and most videos are 'coming soon'. You may want to check them out, or at least bookmark them for future reference.
PowerDirector 10 Ultra
Dell XPS Studio - i7 3.4 GHz / 8 GB RAM / Windows 7 Professional 64-bit