I think cherry glass would cheapen it. Have you considered a mirror glass, don't know if I would like to maintain it but others here swear by it. Tiles like Earp Bros suggested look good. I also like the glass mosaics but they might be a bit blingy for your room. I went back to laminate for my new kitchen and I really don't think you can beat it - it just looks so clean and uncluttered, and better still, it doesn't break the bank. Congratulations on a beautiful job.

Trust me they won't be easy to clean. It scares me thinking about this. Next time I'm going to minimise grout in the splash back choice if possible as this is the part that is hard to clean so bigger tiles are better and definitely gloss finish for ease too. Good luck.

Nothing wrong with large tiles for a splashback - though all personal preference, we used them successfully in this renovation with a minimal grout and the awesome texture and pattern of your tiles they will not appear big, I would think they would look more like a mosaic tile. Go with what you love and enjoy!

This is going to come down to what your space is like, light, how you use the kitchen, how does it relate to other areas of the house ie. is it open plan, so needs to complement other areas such as dining & family? Here are a few examples of backsplashes with concrete benchtops. Depends on your personal style & taste as to what appeals to you. My 1st reaction was marble, it would give interest & movement but without knowing what else you have going on in the room...