Considering most editing houses use Macs, I think that speaks for itself.

it really does come down to personal preference and you are going to get just as many saying one or the other.

Basically I look at, where is your money invested in the Software. Can you afford to purchase replacement software (legally), for a Mac, if you already have registerable versions of software.

If money isn't any barrier then go the Mac.

Myself, I too am a Windows person and have been since the first version was release and even before, used precursors to windows machines.