I have been installing home automation since 1996. X-10 is cheap and works okay, but it has a slow response to commands. The advantage to X-10 is you can retrofit any home with it just by changing switches. I prefer SwitchLinc products over Leviton and X-10 brands. SwitchLinc and Leviton products can be purchased from http://www.smarthomepro.com
The Lutron Radio RA system is expensive and proprietary. An integrated system is the best way if the customer is willing to spend the money. I have installed several integrated systems in homes over 6,000 s.f. using the Aegis system. http://www.aegishome.com
Check out http://www.homeautomationindex.com
for more information.
[This message has been edited by sparks55 (edited 04-20-2002).]