I would put it on the wall behind the dining table, turned the other way to how you have it in the other photos. Take the small pics away from that spot and away from the wall near the christmas tree corner and group them all together on the wall between the 2 windows. find a large piece or 2 of art for the wall near the christmas tree. Thats what first comes to my mind to do. Its not to busy at all, Brandi is correct, the pictures are too small to be so far apart on a large wall.

l just recently bought one from holy funk they have some nice ones at a reasonable price

Early Settler has fireclay ones for around $1000.

Hi Jodie, as someone already have mentioned above, you can choose from Stainless steel, Glass, Laminex "Metaline" (there is a reflective finish in this range)...Depending on the splashback size you have in your kitchen, these materials come in large-sized panels which means no joints and therefore an easy care...Hope this gives you some options to look at