The Alyse Edwards "Tongue in Chic" is also beautiful! If you're going for a farmhouse look, you may want to stay with a classic horizontal offset pattern, rather than a herringbone or vertical, which say more contemporary than farmhouse. And yes, a glazed shiny tile will be a nice counterpoint to your honed quartzite.
As for a lighting fixture, you can use a billiard-style fixture, which needs only one junction box. It can have 2 or 3 lights, whichever works best with your island. Take a look at Rejuvenation--they have many options, all customizable, for a very reasonable price.
Beautiful kitchen!
Q