In other developments...
I've decided on a carpet for the stairs and second floor! The best one seems to be Fabrica's 'Denali' in colour 'Ovation'.
I had all my carpet samples out and matched up the right one to all the other selections I made for finishings so far, then narrowed it down to two, then decided on this colour solely for it's kid resistant factor. It's remained the exact same colour all week while I had it lying in the most highly kid trampled spot in the house. I'm happy - not that I won't vacuum and clean just as often, but it's nice to know that if I miss a day when company is coming, I don't have to be embarrassed!
Fabrica Denali in Ovation DN12