Re: DFP image corruption with DVI
Yes, you need to run:
startx -- -logverbose 6
and then generate the bug report. The bug reports that you've attached were not generated after starting X with that command.
As for the hardware, you'd need to purchase a card with dual link TMDS support. Most (but not all) cards with two DVI connectors are usually dual link TMDS capable. Its best to read the fine print, or contact the card manufacturer to confirm.