Searching for the right backsplash

The kitchen renovations are advancing really well. And we are now trying to find the perfect backsplash for it. Here are our options up to now.

1- marble mix long tiles

We really like this one. Love the mix of grays and the strong statement it makes

2- Mix of lights grays glass tiles

I bit more soft and more reflective since it is glass tile

3- Dark gray glass tiles

4- stainless steel tiles

the mock up doesn't do justice to the tile

It's a square stainless steel tile. I personally think that it's a bit too much stainless for our kitchen with the stainless appliance and the stainless counter tops

and it is really expensive

5- White marble tile

I bit to traditional for my taste

Here you can see all the tiles. The ipod is to give an idea of the size of each tile

My boyfriend and I really like option 1. But maybe it's too dark, or too much of a statement. I also really like the option 2 and the option 3. Maybe I would take option 3 in a lighter gray to match the wall color. Arrg this is hard!!! What do you think? Help me please make the right choice.