Thanks all. I’m really enjoying reading your responses. Would happily avoid kiln dried due to cost so pleased to hear it may not be the best option in any case. The structure is already clad in weathered oak so ideally we’d want the staircase to match it ultimately in look. I assume other hardwood options would have quite a different appearance.
Steel definitely has its benefits but it is on the front facade of the house and driveway and I want to avoid the ‘fire escape’ look.