Hi fishv12,
Welcome to the Mattress Forum!
I’m sorry about your bad mattress shopping experience. It is off-putting to find out that some retailers will dramatically lower the price if you threaten to walk out the door, but will be perfectly happy to charge you a much higher price if you are more “agreeable” during your shopping experience.
For those of a higher BMI, post #3 here has more information and suggestions about higher BMIs that is worth reading.
Higher BMI ranges will need more durable materials and components in a mattress and in a BMI range of 30 or higher I would include any 1.8 lb polyfoam or 4 lb memory foam as a “lower quality/density” material (relative to a higher BMI only) and minimize their use to a total of “about an inch or so or less” in the mattress.
Polyurethane foam: If your mattress is one sided then I would look for 2.0 lb per cubic foot density or higher. If the mattress is two sided then I would use a minimum density of 1.8 lbs per cubic foot or higher.
Memory foam (or gel memory foam): If your mattress is one sided then I would make sure that any memory foam is at least 5 lb per cubic foot. If the mattress is two sided then I would use a minimum density of 4 lbs per cubic foot.
For help in making comparisons, the Tempurpedic Tempur-Cloud Supreme Breeze 2.0 (these are USA specs) contains:
2" TEMPUR-ES comfort layer 4.1LB
2" TEMPUR-Climate Material 5.3LB
4.0" Airflow Base Layer 2.2LB
3.5" Airflow Base Layer 2.2LB
You can perform a forum search on Ottawa here (just click on the link) to see if any businesses have been discussed close to your home. Unfortunately, it’s beyond my capacity to maintain a listing of the offerings for the various stores in geographic regions in an ever-changing market, so I wouldn’t have an idea of what stores near your home might offer memory foam products.
Besides Novosbed, which you already mentioned, you may wish to investigate another site member here, Memory Foam Comfort. They are located in Quebec, but ship all over Canada and they offer a component-style memory foam mattress where you can attempt to “approximate” the Cloud Supreme Breeze. I think highly of two of these site members.
While it is a bit of an older list, here is some online mattress sources for Canadians in post #21 here.
If you investigate other products and have questions about them, I’ll do my best to answer those questions for you.
Phoenix