Looking for a mattress with very specific qualification

Hi! I am looking for a king size mattress that meets these points:

• Good edge support (aka the edge will not deflate if you sit on it)
  
• Pressure relieving (as much as this as possible please, both my partner and I have chronic pain)
  
• At least 12 inches
  
• Able to stand up to a couples extra curricular activities and the occasional rambunctious kid
  
• can be shipped to me
  
• preferably under $1k USD if possible

I have been looking at the nectar hybrid but it is a little too pricey for my liking and if I can avoid spending almost 2k on a mattress that would be great. I am in the US (ohio). Unfortunately, I can not get out to mattress stores so I have to do my best to judge best on comments here and reviews on the mattress.

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