I can't even imagine migrating from a Mac to a PC. Every single experience I've had using Windows (of any flavor) has been an exercise in frustration. I regularly watch my exasperated colleagues dealing with Windows glitches, viruses, malware, spyware.... and I don't want any of that. OS X just works. Always. And being a visual person, the blocky, ugly esthetics of Windows is another major drawback. The operating environment reminds me of a dull, corporate cubicle farm.

I also have to heap some praise on Scrivener. I wrote 2 drafts of my book with it, and it's spectacular software for keeping organized and creating a long manuscript. I output into Word for final copy (since that's what my agent requests) and that takes a little tweaking, but not much.

Good luck on your transition. I consider switching to 'Doze from a Mac the equivalent of swapping out a BMW for a clunky jalopy held together with duct tape and string. But it may work for you.