The grey on the western wall looks dark and purplish on my monitor. It may come over as too imposing and monolithic on the southern face. If you're sticking with the grey palette then a warmer tone would suit the sandstone better. Does Dulux have a colour palette recommendation that includes your Berkshire White plus a grey? Check online or in store pamphlets. But, for such a big, expensive, and impactful paint job I would actually be tempted to get a colour consultant. You're not just repainting a loungeroom wall if it doesn't work!

Go grey as advised above, don't paint window frames if they are metal but leave alone, plant sasanqua camelias along the side boundaries (they can be hedged) to screen out neighbours & add greenery plus colour, landscape the front. Don't do white stones as they look dirty after a while and are blinding in the sun. I'd get rid of the stones altogether. If you are a gardener, put in box hedging and some standard roses (yes, I know done to death but they are charming), or draw up something on paper first - play with shapes. A garden makes a house look good.

Is the pic of the house attached to this discussion exterior rendered in Taubmans pebble bay?

Hi vicky, Think pattern, texture and colour. All needed. Make the cane table the left corner table. Get a much larger coffee table set up or a set of tables or chest and/or ottoman. Glass tops are good so it doesn't get too heavy. For comfort essential to have approx. 45cm between the edge of the seat and the "put my wine glass down" surface for everyone. Being able to put ornaments and at other times platters of food on a larger surface brings the room to life. Add cushions: 2 geometric patterned light cushions in different strengths shades of orange/ brown on beige for instance, one rusty plain one in 3 different sizes per 3 seater, one cushion on a 2 seater.. Add a furry throw over a chair. Add a tall floor lamp with a colour that picks that up. Yes definitely artwork. Doesn't need to colour match. Get something you love. Hang lowish to suit sitting down height. Shops often let you take cushions home on approval. Ask.