Use the darker grey for the gutters. You could even do the dark blue colourbond. The grey and white you have done look fantastic. So fresh and "Hamptons" get some blue or slate grey pots only a couple but make them statement size and choose some multi colour leafy plants.

Tribble - I think we're seeing this from two different perspectives. I want a house that isn't going to go up in flames while I'm inside it. I'm prepared to accept that the house might go up in flames, but if it gives me good time to get away, that's okay with me. Random embers are not going to set a fire-resistant wood deck on fire; it will take a lot more than that. And by the time the fire is that powerful, I would be long out of there. It was the "stay and fight" mantra, not fire resistant decks, that killed people in those bush fires back in 2009. By the way, the fire requirements where we were (NSW) required roof sprinklers. Turn on the sprinklers, and the deck and everything around it, the sides of the house, etc, were all going to be hosed down, and nobody had to be there to do it. Just turn on the pump and get the heck out of there. You might want to look into those, because for me, the knowledge that we had those sprinklers was a big security feature. We also had fire resistant screens all along the side of the house exposed to potential fire, so, again, it would have been difficult for embers to get in or under the house. And yes, we had requirements that the subfloor be protected by non-combustible walls. They required concrete blocks to protect the subfloor area. A massive bushfire would have taken out the house, maybe, but there was enough there to protect us long enough for us to get out. And that's what matters in the end. I don't believe you can totally fire-proof anything except a totally concrete and steel structure, with nothing but concrete and steel inside it. 9/11 showed that a concrete and steel building will still burn because of the combustibles inside it. So, it's a matter of risk assessment based on the best advice you can get, and that often comes from the guys in the RFA. The OP should find out what the actual regulations are, and then talk to the guys that actually deal with the fires, and base here decisions on that.

Ok here is a photo i just found...This is Queensland Spotted Gum, which is more varient than the NSW Spotted Gum. Friends that have seen it say how gorgeous and different it is...and so so glad we didn't end up going with blackbutt :)

We're currently building and have out down blackbutt. It's only been laid, still to be sanded and top coated. We plan to just finish with a satin waxy product. I'd have to ask hubby what exactly it is. But we don't intend to stain. We've seen this finish on 2 recent builds and it looks fab. A small pic of ours. I can take a larger one of the entire open plan room if you wish. This was just one I had on the iPad :) We love the blackbutt. We originally chose as it was cheaper than spotted gum. Ours is standard grade so has more knots, etc than the higher grade. I actually prefer the feature of the standard grade. We have kids and a dog so hopefully will cope ok.