I have 10m ($199) & 15m ($299) HDMI cables that are CL rated for in-wall installation and work great.
The biggest issue with DVI or HDMI cables is not so much the cable but instead the driver set in your source device. While I have not tried all of the sources out there, I have heard that there are some problems with the Voom units going over 5m consistently.
We also have HDMI female/DVI male converters.
BTW, I am familiar with the Ram Rev2 cables and they are very well built, too be blunt the difference between theirs and mine is our CL jacket rating.
I do not think that the HDMI cables are up on our website yet.
www.etherealhometheater.com