I have 2 instances of Win 8.0: one in a VM, another on a Surface Pro.
It won't install on Virtual Box 4.2 (apparently needs 4.3 (NX, PAE, SSE2 support)). On this host machine, I run other VMs that I don't want to screw with until this weekend. So that's on hold.
On my Surface Pro, it's downloading at about 1% per hour. I don't care much because I'm enjoying the RedSox/Tigers game.
Thanks for the tip about "use existing". If the only choice was to use a Live ID, both would get wiped, and the Surface Pro would move to Linux.
(and I don't think I'd ever look back.)