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.

I would let your natural elements shine ..match your wall colour to your classic white laminate and be lazy and paint the same for the ceilings so not to distract from your features or you could use your Caesar stone Urban as an inspiration and choose that colour as wall colour..ie go a bit lighter ..since you can play around with the colours as your room has lots of natural light .. Urban is a nice colour..brownish grey.. personally I'd just go white..

Natural White & Whisper White will both work well with Polytec Classic White. I would steer clear of Lexicon - it's a little too cool to work well with Classic White. You might find it easier if you get some sample pots & paint up some large boards as both Whisper White & Natural White will look lighter and 'more white' once they are on the wall. Lexicon half or quarter would be incredibly light as a wall colour and too stark for most applications.

I like the idea of hardwood flooring and as previously said you can add nice rugs for comfort and texture, they can be changed out at any time for a different look or fashion, I found light carpet shows all spills and marks and as also previously said here dark colours show lint, animal fur and anything lighter like fluff ...I do think hardwood floors in the long run keep you from having to re-do carpet especially as you have no idea how the renters will treat your investment. I also find myself having hardwood flooring with rugs it is all so easy to keep clean.