Am I correct in thinking that all the cat 5e data cables will run back to a utility hub in the utility room and this hub effectively works as a home server. Are these hubs widely available or do you have to go down the smart homes route??
Kind of. They run back to a central switch or patch panel. The home server is another bit of kit that you need if you intend on streaming music and videos around the house. It stores your streamable content i.e. music video, photos. Here's an example [broken link removed]
You'll also need a networked media player of some sort at the other end to play the data being sent from the server. An xbox 360 or ps3 or laptop will do or you could get a dedicated media player like a Tvix to do the job.
You do NOT need to go down the smart home company route for streaming data. All the necessary information on how to do this is on the net and the equipment is readily available. You'll find a schematic to suit you needs online.
Am I also correct in thinking that for any room where I want a tv that I should install two co-ax cables and if I want to add sky at this point that I should have four co-ax points? Will all these co-ax cables be routed to a central point in the attic space??
Pretty much. Have a look at the various schematics below. This should clear things up.
http://www.cyberselect.co.uk/range/1693
Finally, if I want to install a sky dish at some stage what do I need? A dish outside with a co-ax cable running to the central location in the attic. Is there a requirement for a phone point or data point for sky? What provisions do I need to make regarding a hole to take the wire into the attic?
Run 4 co-ax from proposed dish location to central location in attic where all other cables are running from.
You'll need a phone line wherever you plan on putting in a sky box. Absolutely necessary for sky multiroom to prove you haven't sold on second card and box to someone else. Otherwise just required for pay per view.
Is it possible to play a DVD in the main living room and watch it in the master bedroom? If so, then what do I need to do??
Simple video sender for about €20 will do the trick. Otherwise see the above schematic for a more structured solution.
Should I run my coax cables back to the utility room also or just leave them in the attic??
Doesn't really matter. May be easier from a wiring point of view to run everthing to attic. Personal preference.
Finally, if I wanted to put in a central music system, what type of cabling would I need to run to the speakers and should I also channel it back to the utility room?
Music on home server. Laptop/ media player in Living room/kitchen/ bedroom pulling music off this server. Connect laptop/ media player to amp or AV receiver. Speakers are connected to amp. You can get decent 1.5mm.sq speaker cable on ebay for abour €40 per 100m.
Alternatively, look at a Sonos system. Expensive but wireless and easily expandable.
Best of luck.