All I have read says Windows 7 and FreeHand work fine. This was discussed on the Adobe forums over the years and no problems as such.
As you noted, most here are Mac users so much of the angst is because of changes to Apple's newer OS-X removing the compatibility mode (Rosetta) that allowed older apps like FreeHand to work. Microsoft has kept this backwards compatibility intact in newer versions of its OS.
Yes, running FreeHand MX in a Windows environment within OSX is doable but it is more about having a transparent workflow between the two running OS's. Copy/paste and file exchange have to be considered. And this is only a hedge as time goes on without a modern version of FreeHand available.
That said, Windows FreeHand users are presently more self-sufficient with compatability issues and you may as well stay with a PC. But keep watching as this issue of compatibility is addressed.