I'm confused...why not just HDMI to HDMI ? It is possible you might lose the audio feed when you used an HDMI to DVI adaptor, since DVI spec's do not include audio. Depends on the DVI cable and the type of adapter, but a simple HDMI cable of the length needed is so much simpler.
this is a fairly large diameter cable with larger individual wires (22 ga.) to insure good performance over the longer 25' distance. I use this type of cable to hook an HDMI equiped laptop computer to my HDTV.