Hi needsmrest,
The Dreamfoam gel is very new so there is not a lot of feedback yet. It is similar to the Cloud Luxe and they actually bought a Cloud Luxe and used it as a design goal. They tell me it’s very close but not quite as soft.
Select Foam also has a line of mattresses that are specifically made to match the Tempurpedic models based on the layering and foam densities but also extensive side to side ongoing comparisons by staff and customers at their brick and mortar outlet (where they carry Tempurpedic for side to side comparisons in real time and use the feedback to refine their designs).
NOTE ADDED: Select foam used to be a member of this site but because of ongoing customer service issues and delays their membership was terminated and I would read the warning here before considering them.
Rocky Mountain Mattress may also have a model that would come close to matching some of the Tempurpedic models and they can also customize the layering in their mattresses and carry memory foam mattresses where both the memory foam layers and the base foam layers can be interchanged and exchanged.
All of these are members of the site, have good quality, value, and service, and are very good to work with on the phone. They would be well worth talking to about your preferences and about which mattress they make that might work best for you.
Dreamfoam mattresses on Amazon are a final sale (except the Eurotop model where the comfort layer can be exchanged for a small fee) and there are no refunds or exchanges. This is part of the reason the prices are so low.
Hope this helps
Phoenix