We're building a new house soon, and my current plan is to distribute audio and video using CAT5. However, I've been reading a lot about the new HomePlug AV spec which was demoed at International CES in Vegas in January. This is getting 200Mbps in the lab, and supposedly 170Mbps in a home environment (the speed shown at CES), and is being billed as capable of supporting HDTV distribution. This leads me to believe they really expect to get most of that bandwidth under real-world conditions. The earlier spec, HomePlug 1.0 released around the end of 1999, had real-world bandwidth numbers of only about 15%-40% of the quoted peak bandwidth of 14Mbps. This clearly illustrates that the quality of the wiring (and probably other conditions) have a huge impact on actual throughput. However, if they're advertising HDTV support for the new AV version, it would seem they expect the intervening years' advances in signal processing capabilities to overcome most of those problems. Still, it can't hurt to be prepared, so I'm wondering if anyone here can give me suggestions about specifications I could provide to my builder that might improve throughput if HomePlug AV takes off.