I know the CAVs can support TV or VGA monitors (but not at the same time)..so the question is...1-connect to the TV port and convert to VGA?..or 2-connect to the VGA port and convert to a TV. Either way is possible. Generally...1-is a bit cheaper and more prevalent since many people use them when doing presentations on TVs.
I have used Aitech..not cheap, but, has good quality.
http://sewelldirect.com/AITech-MaxView- ... -20-ft.asp
There are cheaper converters, but, many are USB powered..i don't know if your CAVs can power those devices or not.