Hi cinn,
It’s good to see you’re getting close and I completely agree that if you are leaning towards a memory foam mattress that is sold online that the next step would be to find the Tempurpedic model that works best for you based on some careful testing and then along with your conversations with the online providers you are considering you will be in a much better position to choose between the two you are looking at or any of the other online suppliers that make a mattress that is a reasonable approximation of the Tempurpedic that you think will work best for you and that matches the parts of your personal value equation that are most important to you (including any return or exchange options).
I’m looking forward to finding out what you end up deciding.
Phoenix