ROM's I have attempted.
Now it may be how I am doing this, but I followed the directions posted pretty much all over the place, boot phone -> Hookup USB (Charge Only) -> Run RUU. And it will give that error message. I have also attempted the PC36IMG.zip route, but it always says, "No ROM Found, or Bad ROM" something like that. I read that it could be the format on the SD card so I used a new SD formatted in Linux... Still no go.
I am still looking, but so far all failures.