
Brooklyn Bedding
Signature Hybrid
Durable, comfortable, adjustable firmness; excellent value.

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Personally, I like something that's soft while being supporting since I always get mild back pain when I don't sleep in my own bed. So I have a koala plus mattress for my specific needs. On the other hand some people like a firmer sleeping surface so they'd go for an option with a harder foam. It all depends on how you sleep
I feel it’s a hit or miss situation with all mattress brands. Recently moved to an unfurnished property and my back was dead by the constant 4 days of packing and moving. Slept on the floor for a week and the cold floor made it worse. Then went into the mattress rabbit hole and always wondered if I put so much money and it doesn’t work out. All the top three, ecosa, sleeping duck and koala had fair share of good and bad review. Bought the koala (firm) at the end and has been great since (people different opinions). At least you have 120 night window to return on all the mattress-in-box brands. Good luck with your journey.
I’ve had koala (firm) and sleeping duck (firm/medium). Sleeping duck was softer than koala. The sleeping duck medium I found quite soft after awhile
I considered getting an Ecosa (friend's recommendation) but the online reviews were terrible! It really put me off. I consistently saw people say they're too soft/weak at the edges. If this is the case, it might not be well suited to a heavier person. Just something to consider, OP. I don't have to account for some of the issues you've raised, OP, so take my recommendation with a grain of salt but I got a Koala mattress a couple of years ago and sleep really well on it. It's a medium/firm which thankfully isn't too firm as I get tight muscles and can't sleep on anything too hard. But it's definitely not a soft mattress either. I dare say it's 'just right'. Edit: Somebody else here said they're 150kg and didn't like Koala as a bigger person, so might not be suited to you. Best of luck OP, and good work on the weight loss. It's no easy task.
Firm koala mattress is pretty firm. It actually got too firm for me and I flipped it over to the medium firm side instead.
Koala king and you won’t look back. It’s awesome

Brooklyn Bedding
Signature Hybrid
Durable, comfortable, adjustable firmness; excellent value.

Sleep EZ
Organic Latex Mattress
Highly customizable layers, durable; but extremely heavy.

Helix
Midnight Luxe
Pain relief, side sleeper support; but some find too soft.

Purple
The Purple Mattress
Unique grid feel, cool; but heavy, expensive, polarizing.

Brooklyn Bedding
Aurora Luxe Cooling
Excellent cooling, zoned support for heavier sleepers.

Ranked #1
Novaform - Platinum 16.5" Luxury Hybrid Mattress

Ranked #1
Brooklyn Bedding - Titan Plus Luxe

Ranked #1
Purple - The Purple Mattress

Ranked #1
Sleep EZ - Organic Latex Mattress

Ranked #1
Helix - Midnight Luxe

Ranked #1
Sleep EZ - Organic Latex Mattress