My personal opinion after 15 years of collecting, quite a few SOTC posts, and having owned a considerable number of Omega watches that never made the cut long term, is that this is a hard pass.
My experience is that the question today isn’t one about “what is reliable” — all of these modern watches are plenty reliable. We are mostly buying the brand name here. We don’t pay more for a Rolex than Omega for build quality. We certainly don’t pay more for a Patek than a Rolex over build quality. That leaves one thing — brand. These are lifestyle purchases. If that doesn’t matter to you, buy a TISSOT PRX. You’ll save a grip of money and have a great watch.
Therefore, the better focus is style, prestige, uniqueness, complexity and long term value.
To me, that Omega really has little to offer across the board from any angle. In fact, I’d go so far as to say that the only Aquaterra I would consider today, is a pristine preowned Skyfall in 38mm from years ago. If it has to be brand new and Omega, I might, just might, consider the silver/white dial with blue indices small seconds release in 38mm.
https://www.omegawatches.com/en-us/watches/seamaster/aqua-terra-150m/small-seconds/product
Alternatives? It seems like you are looking for something in the dress/sport genre.
Grand Seiko makes a number of remarkable automatic watches with stunning dialwork at the same price point, here is one more unique example than that Aquaterra:
https://www.grand-seiko.com/us-en/collections/sbga413g
If you don’t like that, explore the catalog, there are a lot of great options.
I don’t know much about your finances, but a second generation preowned Vacheron Constantin Overseas (model 47040) would be a phenomenal one-and-done watch to source. Yes, more expensive ($10-15k), but also going to significantly increase in value long term (which makes the watch very inexpensive), is light years ahead of that AT in design, and is part of the mythical holy-trinity of watches. Here’s mine:
https://www.reddit.com/r/Watches/comments/jytsh9/vacheron_constantin_overseas_gen_2_finding_a_new/
I’d also consider a preowned Breguet Type XX Aeronavale. These can be found serviced and in minty condition for around $5k. Incredibly unique and beautiful with a powerful history (Napoleon Bonaparte owned a Breguet).
https://www.breguet.com/en/timepieces/type-xx-xxi-xxii/3800
You’ve got a solid opportunity to make a decision that really leapfrogs you. Save a few trips around the sun and stretch yourself on this purchase. Get something that is worthy of owning forever, and that might also be a watch you can retire on.
Good luck!