Look for an ECU that has all functions built-in. One thing you should specifically ask about is whether or not the system conforms to industry-standard power line technology. If it conforms, you won't need lots of extension cords running throughout the house.
Also look for the ability to control a computer. As mentioned in Tip #3, be sure your ECU controls the computer, not the opposite. On-line services, such as the Internet and the World Wide Web give you the ability to shop, bank, do research and communicate with people who share your interests--with incredible ease.
For the best computer control, choose a system in which the mouse and keyboard are operated separately from the PC. This enables you to perform any mouse function without a lot of extra work, such as "warm booting" or "drawing in paintbrush".