I am looking to have whole house audio (not sure on video), and control lighting, hvac, and security I also plan to have 3 camera monitors. I have read read many of the posts and have a few questions. If I use HAI for lighting, hvac and security and use Rusound for the audio distribution then is crestron able to combine these 2 for total contol or should I keep them seperate and save money? What do I give up specifically (please dont just tell me flexibility) by not doing all of this through using the more expensive Crestron solution and how much cost difference are we talking. Is the crestron option double or triple the cost. (home is 6,000 ft, 4 zone 4 source audio)