(This BSOD happened after "Starting Windows")
I did a clean install of a Win 8 Pro with an "upgrade" key about 2 months ago and its still working fine. I wasn't able to register it but I have received updates and am invited to download W8.1. I was going to go your route but I couldn't get an good Windows ISO on a flash. Suggest you clean up the mSSD somehow and install the W8 upgrade.
These articles discuss similar situations/workarounds...