Hi Dabbit,
Welcome!
The only one I can speak to is Naturepedic. Advice: wait for a sale; you can often save 15-20%, which is sizable with a mattress like the Azure.
Also, 10 years down the road, if the mattress needs to be tweaked, you can simply buy one or two components rather than the whole mattress - saves a lot down the road.
Best of luck with your search! Call or message us if we can help.