This is the room in question the furniture will be replaced with a creamy white suite but the carpet will also go when the new furniture arrives

We have a new house, one level, and the tile, carpet and timber work well together. The tile is pretty seamless with the wood, and there's only a small bit of transition strip or whatever it's called between carpet and wood or tile. Nothing that would stop a wheelchair. I think the issue is to make sure that the base is level: good tradies should do the rest.

Im carpet too... as you will then have flexibility for moving rooms around later or for resale purposes.

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.