You have lovely pieces to work with. To my mind, it appears you have a long and a short MCM credenza/buffet. I'd prefer them switched and then move the art pieces so they take up no more than 75% of the credenza's length. Also keep them closer to the furniture and lower than the door and window frames if possible. Red is a wonderfully appetizing color and I'd love to see it on the dining room wall as well, although I know it may make the air unit more obvious. The dining wall is the one I'd fill with a bookcase for the cookbooks. As a one-time owner of nearly 100 cookbooks, I found they made for great dinner party conversation, along with an unabridged two-volume set of the English language dictionary. An IKEA bookcase could work well and hold plenty of books. The white shelf system with the red wall behind and the backs of the shelves painted red would look great! Or you can paint the bookcase red and leave the wall white. Group books by color for another touch of fun! Don't forget to show off some great "foodie" accessories too.

also have uploaded a photo of our piano and mirror which I love. and I photo of our dining room light which I would also like to keep there.

Wax is good on a dining table as easy to apply a bit more in the event of cup rings etc.

Hi Jennifer K, thanks for your comments. The photos you have posted are really lovely but not really suited to our environment and house, which I know is impossible to tell from one photo. We have built a modern farmhouse on 10 acres. That room looks out to beautiful green countryside and the river below. The dining room is a bit of a feature and is completely different to the rest of our relaxed lodgey style house but I don't want it to be too modern, if that makes sense. The photos have given me a few ideas so thank you so much for your help!