This forum is open to any open discussion, including this [img]images/smilies/icon_thumb.gif[/img] Canyon Carver
can probably shed some light on the Mac side of things for you, I have heard that they are good for graphics and such myself. One thing that I would keep in mind is that software for Mac's is quite limited compared to PC because Windows has most of the market so that my be worth researching a bit before trading it in.
DVD writing/editing is still in it's infancy so it will take some time to get up to speed regardless of what platform you are on. I am not sure about the Mac but I know that it seems like new software is coming out all the time for the Windows platform. All in all what I think it comes down to is hardware, it takes a lot of horse power and memory to edit video. I think in either case that's what you will be looking. Just my thoughts [img]images/smilies/smile.gif[/img]