I just bought a medium-firm top of the line Kingsdown spring mattress (2500ish dollars) and I couldn't be happier. It is the most comfortable mattress I've ever had. No off-gassing whatsoever and am very smell sensitive. I did a lot of research as well before settling with that one. No regrets so far.
I've had my Kingsdown latex and foam mattress for at least 12 years. There is an indent where we sleep now, but it's still extremely comfortable. I bought it on a whim because it was on clearance and it's the best purchase I've ever made. It's insanely heavy and has no carry spots; it took 3 adults struggling to carry it when we moved. That's my only gripe!
I've been very happy with Kingsdown, which you can also get at Sleep Country among other chains. It's also Canadian, along with a bunch of other manufacturers that've been listed here
We are currently replacing two Kingsdown mattresses - one is twenty years old and one is twenty five years old. They were warriors and I don’t regret the purchases. I have no idea how they are made these days but they were made very well when we bought them.
LanceToastchee
