Hi Steve,
Congratulations on your choice to go after a Shape. To me it's one of the good old fashioned B&O magic things like ib the past even thought it has no glass moving parts.
I do not own one but have thought about it many times and to be honest in many ways (mystery…). Anyway, while waiting for a more educated answer here is some of my thought:
One thing that struck me is that the Shape is bigger than expected in real life. The individual tiles are massive and bigger than I thought. If your thinking rubout it for a long time you should be ware of this but still, don't let yourself be surprised: going 8 tiles over 6 may really be 2 tiles too much.
Colors is a matter of taste. I do think that part of beauty lies in contrast but all the Shapes installations I've seen I've liked were mostly shade on shade. You said the wall is white, but for a clean installation you will need to make a groove to pass wires, meaning you'll certainly need to paint after. Even if not, painting a wall is quite cheap. I would consider installing a Beosound Shape as it should be: like a piece of art, that is considering the tiles AND the wall and the surrounding environnement.
I'll stay away from mixing fabrics, they away different grain and that would immediately make it look like a mix and match, second hand, not coordinated thing.I would also think it twice on the dark oak tile: even if I like it too, I think it ruins the "Shape effect" by saying "under this tile there is something different than under the fabric tiles so this is a sound installation". And wood ,appart on the floor, tends to be a very fashion turning material.
Things I would you depending on what you have at hand:
- Use extensively the Shape simulator on the B&O website (Sure you have!).
- Use a projector if you have one, to display the configuration, including colored wall on your actual wall.
- Print fake tiles on A3 paper, stick them on the wall, let them for a couple of days and see.
- If you're handy at Photoshop, make simulations.
Hope this helps, lucky guy you are!