Ninja
Foodi Dual Zone Series
Dual zones excel, but bulky with small baskets.

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Look on Amazon warehouse/resale - I got my Instant Pot (Versazone Dual Black Air Fryer - Large 8.5L) for £66 when the full price was £109. It was allegedly scratched but arrived in perfect condition. I had similar luck with a fancy bin, so check a few of the big brand listings to see if there are any ‘used’ offers.
One piece of warning about the Ninja dual baskets is that I've read many times that when you run both baskets it takes longer to cook. I have the Instant Dual Vortex dual-basket air fryer, it does not really take any longer to cook when you're running both baskets (maybe 1 minute at most) and you can run it with just one basket in there.
We have an Instant brand dual rack. The first one purchased Nov 2020 went out on us after a year or two and they replaced it. Still using the replacement a few times a week and it’s been fine. Just to throw another brand into the mix. (I’m not a bot or an instant shill just fyi)(or is that exactly what a bot would say?!? 🤖)
Kettle: Xiaomi We've had ours for 2 years, used everyday. No issues. Airfryer: Instantpot Vortex Used regularly for months now, works great. I like the oven style and tray vs basket style because easier to clean. I just pop the trays in a dishwasher along with the dishes. It also automatically preheats and dings to remind you the preheating is done.
I have two. A Instantpot Vortex and a Dreo ChefMaker. I only turn the oven on now for Turkeys and Pizzas.
The current multi-day bloat sale for the big online giant has the InstantPot Vortex on sale for $90, if you like the basket type ones. Large capacity, cleans up easily. Cooks fast and food comes out really crisp. Not a Costco purchase, but can highly recommend with no regrets.
Ninja
Foodi Dual Zone Series
Dual zones excel, but bulky with small baskets.

COSORI
Turbo Blaze 9-in-1 6QT
Effortless to clean and quiet, but no viewing window.

Ninja
Foodi Air Fry Oven Series
Unique flip design, but shallow and air frying debated.

Typhur
Dome
Self-cleaning and quiet, but expensive with shallow interior.

Breville
Smart Oven Air Fryer Series
Great oven replacement with large capacity, but poor air frying.

Ranked #1
Ninja - Crispi Pro 6-in-1 Countertop Glass Air Fryer

Ranked #1
Breville - Smart Oven Air Fryer Series

Ranked #1
COSORI - Turbo Blaze 9-in-1 6QT

Ranked #1
Ninja - Crispi Pro 6-in-1 Countertop Glass Air Fryer

Ranked #1
Ninja - Foodi Air Fry Oven Series