I like PCs because, while I am not a computer wizard by any means, I am a bit of a DIYer. On this PC I have swapped out memory, optical drives, installed a ton of new system software, and upgraded the HD, and it still runs like it is a brand new computer (it's maybe 4+ years old). I like the flexibility of PCs for component repair and upgrade. I hear from most guys who work in IT that it really is a preference thing (not what Mac would want you to believe).
Additionally, the growth of open source programs like Firefox and Thunderbird have eliminated the need for some of Microsoft's crappier programs like IE. Plus, if you buy a higher-end PC, video editing is a snap. I worked in a TV production house a few years back and our AVID editing suites (top-notch pro editing software) were all PC.
So, my vote is for a PC, but I am a PC guy. Also, let me point out that Macs aren't perfect...my brother's year and a half old Macbook had a hard drive failure that resulted in the loss of all his data and his DVD drive is now acting up on him. If I had that issue, I could just buy another on ebay for $50 and swap it out. Happy hunting!