Hi Camowen77, congrats on your build! Love the floorplan.
I've got very similiar kitchen colours (white, light grey, with marbling) so I thought I might be able to help you with the tiles Finding a splashback tile was the hardest decision I think I've made with the whole house! I was tossing up subway tiles, and ended up deciding to go with a glassy white subway tile & lay them herringbone. There are some pics in my thread of the kitchen, and of the tiles (but they are yet to be laid - should be happening next week!) There are some really nice marble penny rounds around if you like that look too.