Hi Smuscles,
I think Lew has given you great advice which is the same as I would suggest (thanks Lew :))
The only thing I would add is to read post #1 here and the information it links to which is more about the steps involved in the process of choosing a mattress and who and what to exclude and what to focus on.
This should “arm” you with everything you need to make a great choice 
Phoenix