Steve4800 – the HDMI Ethernet Channel (HEC) whilst a ‘good’ idea is a dead duck, there are zero devices on the market which support it; it only takes a minute to consider the product managers point of view, would you want to be responsible for all of those IP tech support calls the system is likely to generate!
HDMI :: Manufacturer :: HDMI 1.4 :: HDMI Ethernet Channel
alan33 – lots of conduit is good, lots of cable is good and lots of cable in conduit is probably best of all; though not always achievable on a budget.
Ask the Mods to move your Thread over to the Custom Installation Forum – you’ll get lots of good DIY'er and Pro advice from the boys and girls who wire up houses on a daily basis.
Custom Installations and Installers | AVForums.com - UK Online
Take some time to think through how you want to use the house and what you want out of your Entertainment system – that’ll give you a start on designing the infrastructure; at this stage forget about what specific kit you want just think though how you want to use and operate the system.
Joe