External doors should be solid not hollow core. Beyond that it is as Tribbletrouble44152k7 Trek said, depends on budget and other priorities, and I'll add the house because the nicest most expensive door will look wrong if it looks out of place with the style/colours of the house. From everything I have been told a timber finish needs redoing more often than a painted finish. Edited to add, I thought to check what exactly the standard Hume XS45 1200 door is and for clarification the question is about the same style but the choice between the standard maple finish and the merbau finish? I therefore assume you intend to use a timber finish and amend my reply to ask whether the merbau is a better match for the other colours in your facade?

They would be a custom made door to be in Alucobond. Hence they're more expensive that a mass produced door.

Thanks everyone! It is kinda tricky because we want the screen/security on the outside so as not to "ruin" the nice look. But so far those that have come to quote said it can only be done inside. Which does defeat the purpose of having beautiful doors. We'll keep googling and calling!

I know you want Sydney based companies, but 2 great companies are based in Melbourne but supply to many Sydney sites. SkyRange https://www.steelwindowdesign.com.au