Hi lnorris,
I haven’t written an article on the pros and cons of any brands but there are a few “pros and cons” articles in the articles section of the site (top menu) which talk about latex, memory foam, and airbeds.
I pay little attention to brand names because only the materials in a mattress and how they are put together is really important.
I do often give suggestions to include certain brands in someone’s research if I know they make a certain type of mattress but even then … because the same manufacturer can make a mattress differently in different areas of the country (for example either including thicker of polyfoam over latex or having latex right on the top surface) … it’s still important to know the details of every layer of a mattress and the brands I mention are just “possibilities” that further research into the materials may show to have better value. Brand names mean very little and I would never “rate” them except based on my knowledge of specific mattresses they may make or on the likelihood that they will tell their retail outlets (and through them their customers) what is in their mattresses.
You may also be referring to post #21 here which lists the members of this site which specialize in selling online or post #12 here which lists a few of the better online memory foam choices.
Phoenix