80-100GB Hard Drive - $100
FireWire Card - $30
512MB RAM - $100
DVD Burner - $300
TMPGEnc - Free
VirtualDub - Free
DiVX - Free
Windows Movie Maker 2 - Free
... you'd be hard pressed to find a decent Mac anywhere near the cost for making your PC video-ready!!
Don't get me wrong, I dig Macs (still got my old 6100/60AV around here somewhere *cough*). They're slick, very pretty, virtually virus-proof (no one cares seriously enough to write a nasty for only ~4% of home computers), and their i* series of programs are some of the best computer programs ever. But... it's just not worth it, IMHO. My GF at school loves her Macs - coz she didn't have to pay for 'em!