if your inot production go for a mac, you have the all the editing software which was MADE for the mac, myself i am content with my PC although i do not do a lot of video editing but people i know that do have macs and they are happy with them
If at first you don't succeed, failure may be your thing-Warren Miller
Seriously though, if you're really into video editing try and find somewhere that you can try out final cut pro and adobe premiere. I prefer Final Cut but Premiere is very similar and can be just as good.
get a mac, especially if you want it mostly for editing.
i went from a pc to a mac and when i tried my friends pc after like 4 months of using a mac, i couldnt stand it, everything about macs is just faster, smoother, easier, and just better.