Cisco 8642 HDC. The interface will be about the same but it has more storage. The standard line is that all equipment may not be available in all areas so call to find out.
I stopped by my local WOW office in Columbus today and was able to swap my 8300 for the Cisco Explorer 8642hdc. The Celton Q sounds like a neat idea, but I only have one TV, so a whole house DVR does not really interest me.