The best place is to talk to actual users to find out what they like and don't like about their system and how well the system lives up to the manufacturer's claim.
If you have specific questions, you can contact VideoRay or post your questions on http://www.rovinfo.com.
If you're not sure where to begin, you should read the features and capabilities FAQ to get an overview and learn about what questions to ask and what features are important in certain situations.