I think that is more about what you like, concrete usually denotes a more modern feel, almost industrial if that is your style do concrete if not find a tile you love and do that.

These are a tough find! I do know that they get a lot of furnishing items form Mitchell Gold http://www.mgbwhome.com/. I could not find the lighting on there, but, you may want to occasionally check their website. They are going to set up a Good Wife furnishing collections soon :) sorry I couldn't help!

There is a specialty lighting store near me that I am going to soon with photos to work on lighting at my house. I will show them your photo and see if they have an idea. Probably won't be till Fri or Sat but will get back to you.

A soft, warm grey shade would look lovely, and can be as dark or light as you want. A warmer shade will work with the brown stained wood floor, and the grey will complement the black granite. You could have an undertone of green, blue or tan if you didn't want a pure grey. And it would look nice with any silver metal hardware, either polished or satin/brushed, so you could choose pewter, chrome or nickel. It would still work with white trim too.