Homes should be about individuality not breaking the bank. Hide the wires consider a good floor covering perhaps a lovely rug and build with what you have and enjoy the experience if you tire then just move much loved pieces to other rooms for a total new look. I love homes that are about the people who live in them makes me want to stay and have a cuppa your small pic here gives that vibe maybe the warmth of the wood in here im not sure but dont go to mad and spoil the feel that you already starting to create by getting to many boring mass produced highstreet junk in there

Hi Tony. I think having the tv at an angle and building the cupboard out a little is probably the best option if you didn’t want to downsize the tv. Regarding speakers, ceiling speakers are a good idea if you’re in the construction phase, they usually come in pairs (left and right) and four would be more than adequate for a large room. You would need the ceiling speaker hoods as well for fire and sound protection. Also the necessary wiring would need to be hidden and all speaker wires go to an AV receiver which then connects to tv ( I think...not really an expert on this). Have a look at Richer sounds website, they should have lots of info: https://www.richersounds.com/hi-fi/in-wall-ceiling-speakers.html @ Jonathan, I can feel my hubby’s horrified look if he heard you say that TVs alone have adequate speakers ;-) (he is a perfectionist when it comes to tech stuff mind). We prefer freestanding speakers so we can upgrade as and when. And finally is the fireplace already existing? If not (at the risk of offending other Houzzers:)) maybe consider tv set into chimney breast above a low ribbon style fire, perhaps bio ethanol fuel as these wouldn’t need a flue. Tv above fire is usually a big no no as the tv is too high up and would cause neck strain but the modern styles could work well. Some photos for inspiration (click to enlarge)

I think the one with metal legs would be best. You could use a rug to help break up the "too much wood" look.

It does depend on what look you want in the room, whether contemporary or something more traditional. You could try white or grey, but I think a warm wood would add warmth to the room. Ikea also do a greeny blue one, first pic.