I am planning to add scatter cushions and think if I do a pair of larger ones for each end so they go over the arms to creat height at each end, and a couple of smaller ones, I want to bring some colour in too. I do like the idea of a larger side light at either end to, Switching the sofas is going to be my final fix if all else fails!!

Congratulations on your new home! Now, go cancel that order! Just kidding. Kind of... I really do think, after reading your posts, that you will be happier with the grey couches. Personally, black couches in general seem very bachelor pad (ish). That said, I know there are gorgeous black leather couches available. For a super modern industrial place, maybe. But beach, or that kind of vibe? I am not sure how you would pull that off over the years. Grey or tan (neither are my own favorite decorating colors, but still) would be oh so much better as a neutral for pulling in different color palettes with pillows and art, etc. if you decide to change up through the years... black might make you feel stuck. After reading through what I have written it seems a bit funny, as black is my personal neutral in clothing, jewelry and the like. But as I look around my home there is no black to be seen. Hmmm. In any event, follow your own intuition here, and don't feel like you have to fill the space before your home is even completed. Especially if you are having second thoughts. And remember, this is supposed to be fun for you! When in doubt, leave it out! At least for the time being.

The all black kitchen looks scary as. Maybe because there's no lightness in there at all.

Um why ? I'd do a coffee table , and have the light maybe 1 metre or less from the ceiling . The second one I'd just balance the first one , so if the first one is say 2.5 metres from one wall , hang the other 2.5 metres from another wall . The lights are really nice -- you would want them to be seen , rather than highlighting a couch IMO .