Solved, I think?
Thank you for your advise. I did update to 1.3 and re-uploaded the image. I still had issues with 3 failed tried. All of these tried had errors about Bad RIP values and Kernal Panics.
I had previously ran a Memtest on the client and it had passed everything. However, in desperation, I pulled all the RAM and replaced it with some extras (4GB down to 2GBs). First time after the RAM swap and it imaged just fine.
Not really sure what the issue was, or if it will come back and haunt me in the future, but swapping out the RAM on the client seemed to resolve this for me.