I can't help with the material, but just out of curiosity, are you open to bifold doors?

How many times do you need to ask essentially the same question? The better and larger doors are aluminum for a reason, it is stronger and more durable int he larger sizes.

Hawaii is a humid place so IMO aluminum does not stand up well in salt air and honestly I have found steel doors powder coated are best and aluminum not one bit stronger than fiberglass. You need to talk to the window makers to see the choices that are availbale with the style you want .

Take a look at Marvin Modern. It is a top-quality product that is fiberglass on the exterior and aluminum on the interior. They can do the sizes that you are looking for. Very thin lines. Pricey but excellent quality. Great U values aren't important to you but are still an added bonus.

Prepare...thy pocketbook.

I’m genuinely not trying to be rude, but with a large budget for a build in Hawaii why are you crowd sourcing this?

Marvin Modern doesn't do an 8' wide 9' high door. Fleetwood Edge is my choice. With an unlimited budget you can also look at Swiss manufacturer Sky-Frame for powered options. Link. Vitrocsa too. Link. I think you may want to engage a new architect also.

@Marie J. I like to get as many opinions as possible. I'm a researcher by nature as well, so even if my interior designer says "go with this," I will research it before following suite. Example would be recommending the Cove dishwasher and finding out it's been a problem for many people, so I'm sticking with benchmark Bosh. Things like that.

@Patricia Colwell Consulting We are 3 miles from the ocean, so there is no sea-salt-spray in the air. If we were ocean front, I would agree with you. For steel, I've heard that due to the pandemic prices have skyrocketed. They are also obnoxiously heavy. I lived in a home with steel sliding doors and they were unpleasant to open and close.

"many "professionals" either don't know what they're talking about and/or they only know so much."

Yet you took one "professionals" word on Fleetwood. EVERY company occasionally has issues, I do not sell residential much these days but have many friends I do and they still to this day swear by and sell tons of Fleetwood with no real issues.

@Louis Thank you, I agree, my situation appears worrisome. However, Im actually pretty fortunate that I'm way under budget..... Roof quoted, framing Company signed on & quoted (awesome price for Hawaii), flooring quoted, Lighting (Element 3" architectural Donwlights) quoted, plumbing and electrical, all quoted, etc etc etc. I have a lot of money for windows and doors now, and I'm educating myself as much as I can to be sure I have something that will amaze me! Houzz has been a wonderful resource, I'm so grateful for this site! @millworkman and thank you, you are correct about this! He's just 1 opinion, yes. He only does residential, he's essentially the middleman for Western, Arcadia, Marvin, Andersen, Milgard, etc and he told me he dropped Fleetwood after years worth of issues, as did some others around the country in similar lines of work! But you're right, it's just his take on it and maybe his bitter over a personal issue. I will visit a showroom for Fleetwood anyways, they have one near me on the Mainland. A popular Architect on the Big Island uses Fleetwood in his multi-million dollar homes, and continues to use them for upcoming projects, per his Instagram posts.