I checked out a Temperpedic at a mattress store and liked it, but didn't like the $3-4K price tag. After checking on Amazon, I bought this one, figuring that for less than $300, if I hated it and bought the $3K mattress, an extra $300 isn't important:
My partner and I lost a good chunk of our clothes and lots of time to a cheap $300 mattress. The fiberglass in the firesock leaked, and the first symptom was a very itchy running t-shirt. It took us almost a week to figure out what was going on. The tiny fibers are essentially impossible to remove, and very hard to see unless you know what to look for.
https://www.amazon.com/gp/product/B00GTCL3JA
Reading the comments on AZ, the less-deep mattresses have firmer support, so I got the 8". I did add this topper (not foam) after a few months:
https://www.amazon.com/gp/product/B075486MDK
3 years later I still love them and am glad I didn't waste money on the name brand at the mattress store (which went out of business).