I've never seriously considered working primarily in a VM. For performance reasons, I suppose, but given how far the VM scene has come, that may well be an out of date prejudice. Maybe Linux under Windows (it would have to be that way round) would work. Worth considering, yes.
You'll get snapshots with VM. That's awesome. While you could setup them with Linux (not easy, AFAIK, but doable with some tinkering), for Windows it's a game changer. You could install anything and just roll back. Don't like that Windows update? Roll back.
