We got a 3-layer 8" queen memory foam from Costco.com on sale for $399 with free shipping.
http://www.costco.com/Sleep-Science-....11737636.html
I chose the 8" for weight saving considerations, as the only difference in construction between it and taller models was the thickness of the bottom layer of base foam. The two upper layers were exactly the same. The mattress was just right for me, but the wife said it was too firm for her, so we added a 3" gel-foam topper(there goes the weight savings!) Too soft for me, but as we all know, "If Mama ain't happy, ain't nobody gonna be happy!".
We also downsized from the optional factory king size to a queen so there would be more room between the closet and mattress, easier to make the bed and get into the closet, but the difference in width is very noticeable when sleeping with the wife and two cats.
On edit:
Oh yeah, I chose Costco simply because if we didn't like it, ...as in hated it, it is simple to return to a Costco Warehouse in its expanded state. Other places will have you ship it back to them, and it would cost more for shipping than the whole thing cost in the first place if you are unable to re-compress it (basically impossible) to a size that is not considered to be "oversize" by the parcel service that you use to ship.
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