I found a website that might be quite helpful for you http://www.colourtouch.com.au/ to visualise what colours and finishes could look like on your house. You can choose a style of house that closely matches yours then choose a number of set schemes, or start with a blank canvas and play around with any colour / finish you like.

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.?

Getting a quote on the Grande Statuario. I think it’s going to be significantly dearer than our first quote ☹️ The crispness of the White is perfect with great veining. Second quote being done with main island in the Statuario and with Smartstone along benches under window and into pantry, in case the first is too dear. Took our Lexicon 1/4 and overhead samples with us. Really happy with the choices. I just hope the first quote isn’t too dear as I’d prefer all white but I’d be happy with the combination of both tops.

The second look like they are designed for stairwells so I'd be a bit wary about using them up higher as the light might be a bit "spotlight" and not diffuse enough. I think both styles work with your house design