You can put the TV over the fireplace, not the best situation but the way the room lays out it is the only logical place to put it. If you could you should add one additional layer on your mantel that could extend it out another 4" to deflect the radiant coming from the fireplace. I would also mount it on a slimline mounting bracket and have the bottom of the TV no further than 4" above the mantle. Ideally you want the TV to be in as straight a line as possible with your eyes. You don't want to look up too high at the TV, it's like being at a sports bar. Also if you can snake up the power and the HDMI from the cable there is a box they make that has both in one so it makes for a very clean installation.

I found this photo online, perhaps it will help. In this picture the crown molding on the cabinets flow from the kitchen to the adjoining room. Maintaining continuity with the color and some of the trim detail will make the rooms transition nicely. Don't overlook the details like hardware finish, lighting and plumbing fixtures as these elements can also tie the two styles together. I hope this was helpful.

I think your original idea to put the TV on the wall between the sliders was correct. I don't think a TV ever belongs in front of a window. After you move the TV, put the two chairs closer together under the window with a table between them, and rotate the sofa to face the TV. You may have to angle the TV (but not the TV cabinet) toward the seating for viewing, but I think it will be a more satisfactory arrangement for you.

Before jumping into the design of your new kitchen, there are a few important points that you should carefully consider and get expert advice on. Viran has compiled a list of 5 things to avoid when designing your new kitchen and has lots of ideas to help you out of any tricky design situations. 1. FOCUSING ON THE LOOK OF YOUR NEW KITCHEN BEFORE YOU CONSIDER ITS FUNCTION We see a lot of people focus on having the right style of bench top, thinking about what splash back to have or even having their minds fixed on a handle-less look without first getting the functional design and layout of their kitchen confirmed. I understand why people do this as this is the most exciting part of the kitchen renovation process and it's what can set your kitchen apart from others. But this can ultimately cost you more in the long term if energy and thought isn't put towards a good functional design for the way you and your family use the kitchen. You can't change the design of the kitchen once it's installed, but you can change the bench top, splash back or even handles in the future at a fraction of the cost of redoing a whole new kitchen. This is where your design consultant is invaluable as they work with you to gain an understanding of your current pain points and then they work to achieve the best possible design within your allocated budget. 2. INCORPORATING A LARGER PANTRY AT THE EXPENSE OF THE OVERALL KITCHEN DESIGN Just because you may have a large corner pantry or built in internal pantry currently doesn't mean you need to, or should incorporate another one in your new kitchen. There are now smarter storage solutions on the market such as the Blum Space Tower or base drawer units which allows you to maximise storage but achieve more benchtop space or incorporate larger appliances into your new design. 3. PURCHASING YOUR APPLIANCES BEFORE YOU HAVE MET WITH YOUR DESIGN CONSULTANT By doing this, you could be limiting the design possibilities of getting a much more functional kitchen based on your current pain points and how you and your family like to use the kitchen. It is always best to have an idea of what size appliances you would like to incorporate and discuss this with your designer but I suggest you wait to buy any appliances until you have seen and discussed a potential design concept. Kitchen Mania works closely with Harvey Norman Commercial division for appliances and in many cases can achieve a great result for their clients when it comes to cost savings on appliances. 4. NOT ALLOWING ENOUGH WALK-ABLE/WORKABLE SPACE By not allowing enough circulation space, you can make your kitchen feel cramped and not workable. You need to allow enough space for 2 people to work comfortably in the kitchen and for appliances such as the fridge and dishwasher to open without any obstruction. To allow enough circulation space it is recommended that you have between 1200-1300mm minimum of space between benchtops, in smaller kitchens I wouldn't go less than 1000mm of space between benchtops. 5. HAVING A KITCHEN ISLAND WHEN THERE JUST ISN'T ROOM A kitchen island is a great feature and very functional, but if your space is too small it is best to forget about this option rather than try and squeeze an island in and realise that it affects the flow of your kitchen and its functionality. In most cases it is best to incorporate a kitchen island when your room allows for at least 1000mm of space on either side of your island for traffic flow.