The "Birch Trees" design sounds very interesting, specially if you install it behind the range hood vent and all the way up to meet the ceiling. Any way we can see a bigger sample? Is it a printed detail on glass? or and embossed glass detail?? You already have a "Wood Look" on the floor, visually communicating wood by way of branches would only reinforce the design. I would however consider an oiled bronze, or dark iron color/look (match hardware hinges/drawer pulls) as "Trim" between the subway tile and the "Branches" tiles. Also if the Birch design is printed on glass you will want to carefully consider what type of backing/adhesive you install it with as it will show through the glass.

Silk would be interesting, not to mention elegant. As for paints, the Silver Illusion appeals, but it might throw green (not sure). I also agree the Tranquil Retreat is a good one. I'm wondering how big the feature wall is, and what is going on this wall, eg TV, fireplace, large artwork, etc.?

you must have read my mind because i really didn't describe it very well but this is almost exactly what I had in mind! I love the greyish green. I think it would look really lovely in the main bedroom as well...I love nature and this really evokes an outdoor feeling. Thank you this may well be my choice

Oh! Sorry I misunderstood your post. I think it depends on what type of planting you will have along your fence line. I assume it will be a Colorbond fence? I wouldn't introduce Shale grey. Of those two I'd prob stick with Surfmist but then I think greenery looks FABULOUS against Monument fencing. The whole back of my house is Surfmist acrylic render and we have chosen Monument fencing and garden retainer walls/seating around the perimeter of our garden as it provides a background of depth against greenery. I know you don't like Monument though. Houzz does give you a variety of opinions and does make you think outside the square. Good luck with your choice!