Im going to be doing the same thing quite soon. Id like to put my TV on the chimney breast with my 5.1 speakers and chase the cables in to the walls.
Could you give me any tips? What did you do for the power cable did you fit a socket or bury a cable? Where do your HDMI and audio connection come out? Did you use a faceplate atntye speaker end or just cable?
Thanks
For the speakers I used no trunking, I just put them in the wall and used filler to cover them up - I worked out by dry fitting a speaker how much wire I would need to come out to be enough to attach the speaker but not too much that it is visible. Make the channel just wider and just deeper than the speaker wire then you can 'wedge' it in to make it easier to fill over as it's not popping out.
For the TV/Fire - I used mini trunking, I think it was 45mm wide and 16mm deep. I used a grinder to make the channels in the wall (this is VERY VERY dusty, I can't emphasise this enough), you can just use a bolster chisel if you wanted.
The TV stand I made sure to get one with holes in the middle, channel for wires is central so comes out the middle of the bracket through one of the holes and has enough spare to plug into the tv with ease.
The cables I made a channel behind the skirting board, into the plaster so they run down the middle, left, to the back wall, along to the left then up through another channel that opens just above the skirting board and then it's all wired into the unit at the left of chimney breast. I then use a Logitech Harmony remote to control the devices.
Power for the TV I made a 1 socket extension lead (Could buy one pre made there is no difference really) and that comes out again at the TV stand by a tiny bit so the tv powered into that. The fire uses a kettle lead so I bought a 3m one to go around to the sockets, which again are all behind the tv unit at the left.
Hope that helps a little. I only have 1 hdmi cable, as everything goes through the amp but it is always a good idea for a second one just in case. I have ethernet cable etc in there too.