Hi JMD5.
You are in the fortunate position to select between “good and good” provided that you also select the optimal comfort level for you!
Nest’s (12.5") Owl Natural Latex Hybrid Mattress is a well-designed bed and a good option for your higher BMI, This mattress has a zippered cover and will allow you to get the most out of it over the years as it allows you to replace or make comfort exchanges should need be. It has enough height to allow for progressive sinking in needed at your BMI but also has enough support to keep your spine in neutral alignment. FIY here are the detailed specs
.1" Organic Stretch Knit Cotton and Joma Wool
1.5" 1.5lb Eco-Flex Quilting Foam
3" Oeko-tex Cert. Continuous Pour Dunlop Latex (Medium 27 ILD/ Firm 36 ILD)
1" 1.5LB Eco-Friendly Comfort Foam
6" Reinforced Edge Coil Support Pocketed Coils
1" - 1.5 lb. Support Foam
Comfort Options - Plush, Medium or Firm.
The same goes for (12") GhostBed Natural ~ Hybrid Latex with pocket coils
Zippered organic cotton cover Viscose/poly blend
1" 1.8 oz wool layer
2" Natural Talalay latex (medium firmness)
8" Pocket Coils (Reinforced proprietary Sprinted Edge perimeter support)
1" Dunlop stabilization base
They are both Trusted members of our site which means that I think very highly of them and that I believe that they compete well with the best in the industry in terms of quality or their products, value, service, knowledge, and transparency. This said if you decide to go with GB Natural make sure to read their policy well regarding any returns in case the comfort level needs to be exchanged for any reason. They did have some issues with accepting or lengthy processing returns.
To help with the final selection Post #13 here has more about the most important parts of the “value” of a mattress purchase which can help you make more meaningful quality/value comparisons between mattresses in terms of suitability (how well you will sleep), durability (how long you will sleep well), and the overall value of a mattress compared to your other finalists based on all the parts of your personal value equation that are most important to you (including the price of the course and the options you have available after purchase if your choice doesn’t turn out as well as you hoped for).
Some of the BillyIdol suggestions may be good (especially the VZone) Before considering the other suggestions you may want to first find and run the mattress specifications you need to know by the mattress durability guidelines here so you can compare the quality of the materials and components for your specific BMI which would need higher density and more durable foams.
Looking forward to hearing about your final decision.
Phoenix