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

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I went from a $400 mattress on a fixed base to a Tempurpedic ProAdapt Firm on an adjustable base. No desire to go back. I sleep better most nights, though I still don’t sleep well. That’s a different issue though. I usually wake up with less back pain too.
We tried the ProAdapt firm and also loved it but were scared off by the price tag. We ended up with the TempurPedic Supreme Firm from Costco and love it. We think it feels similar and it was almost half the price, plus the Costco backing and right now they have a $300 gift card promotion too.
This may not sound like the answer you're looking for - but my girlfriend, who has hip issues, and I, who have low back issues and have had crazy bad sciatica, found that the Tempurpedic ProAdapt Firm really worked for us. My cousin had one in his guest room - when we first sat on it, we both thought it was going to be way too firm - but once we laid on it for a while, it turned out to have enough cushioning while remaining very supportive. We both woke up amazed at how good it was. (And I'm a side sleeper.) So we ended up buying one. That said, I did try out the $5000 Williams Co. St. James Firm in a store and if money was no object, that would be my first choice.
Def do NOT get the firm, I tried the medium in store. One thing I dislike it that it has the quick sand feel where you sink in slowly and when you switch from side to back, the foam reacts VERY slow as its not responsive. Make sure you are okay with that when you try the Medium in store.
My partner and I bought the Tempur pedic pro adapt in firm. It’s the firmest bed we’ve slept in but it is amazing. It still conforms to your body while giving you the firmness you need. It took my body about 2 months to finally adjust to it. We’re so happy with the purchase. I get the best sleep now. It was on the pricey side and we really didn’t want to spend that much but it’s been worth it since our last mattress was god awful.
My wife and I got a Tempurpedic California King split that has finished dimensions 84 X 36 X 12.2 IN So 7' long. I'm 6' 11" 230 pounds. I like a firm mattress and this is "proadapt firm" and is first mattress that hasn't eventually slumped for me (2.5 years in at this point). Also because the bed frame comes with remote for adjustments (raise head or legs) it also has ability to raise lumbar support, but haven't needed that yet. Previously tried Saatva Firm and was good initially but eventually had enough dip for my lower back to notice. LPT: Get a prescription from your doctor saying you need a special mattress, to buy tax free (at least in Texas). Also wait for holiday sales to buy (memorial day etc).

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