I am the victim of S brand mattress that has turned into a hammock after less then two years.  Even though the mattress looks good, when I lay on it my middle bottoms out and I get a strained lower back and I wake up hot, sweaty and tired.  During my many nights of waking up at 3 in the morning I usually go to the computer and do mattress research.  This forum has been the greatest help by far.

Because of my research I have decided to go with a:

• Latex Internation  blended talalay - strong reputation and least likely to compress over time
• SleepEZ  Select Sleep 10000 - Same Latex International latex and about $500 less then the other guys

I am 6'1" 200 lbs     back sleeper
My wife is 5'6" 150 lbs back / side sleeper.
Both of us are in reasonable shape and both of us also suffer from lower back issues

What we are looking for is the firmness of a Westin Heavenly bed and the feel of a Costco memory foam topper.  I like to lay flat with the pillowy layer on top.  I realize that latex has a different feel but this maybe gives you a general idea of what we want. I gave SleepEZ a call and Shawn recommended a Firm / Medium / Soft mattress on both sides.  I would buy a Natura mattress locally but the cost would be roughly $3000. Because I live in Canada and the added expense of shipping I want to order and get it right the first time:

Here are my questions:

1. Does Firm / Medium / Soft sound right.  Would like a second opinion.
2. If I was to put the soft layer under the medium layer does the mattress "hammock"?