Hi whitesox20,
I’m sorry that your Tuft and Needle mattress isn’t working out for you. 
Just for clarity, I don’t provide personal opinions on mattresses, but provide information about componentry and let you make up your own mind on what might work best for your own situation. I help with “how” to choose, not “what”, which is one of the reasons this site is not (and never will be) a review site.
The BME uses higher density TitanFlex polyfoam than what Tuft and Needle uses in their mattress (4 lb versus 2.8 lb), and 4" versus 3". The BME also uses a higher ILD polyfoam core. The BME also is available in three different comfort designations (soft, medium and hard). The TitanFlex will have a more resilient feel than the HP polyfoam used in the Tuft and Needle. You’d want to phone Brooklyn Bedding for their recommendation as to what comfort designation that they would recommend for you, based upon your sleeping preference and somatotype and BMI, and also your reaction to your Tuft and Needle mattress.
The Addable mattress uses good quality materials, and it uses memory foam in the upper layer, so would have a bit more of a “dead” feel than the TN or the BME. It does represent a very good value for the materials used, and there would be no “red flags” for the componentry used for 160 lb sleepers.
You may find complete specifications and a synopsis about both the BME and the Addable in the simplified choice thread here. And as you are already aware, Brooklyn Bedding and Addable are site members here, which means that I think highly of them.
You can read more about the Tomorrow Sleep mattress in post #2 here.
Warranties in general are not nearly as important to me as knowing the materials because the reason most people need to replace a mattress is not a manufacturing defect but the loss of comfort and/or support which is not covered by a warranty. Knowing the materials in a mattress will tell you how long the original qualities of a mattress will last relative to other types of materials, and choosing a mattress based upon the warranty is one of the least important things I recommend to consider. Additionally, there’s no way of predicting whether or not Serta “will be around” in the future. All you need to do is look at the bankruptcies in the past decade of both Spring Air and Simmons. The size and length of time in business of any mattress company isn’t an indicator of the business being a healthy concern moving forward. But again, the warranty to me is of very little importance as compared to the quality of materials being used.
You can also find specifications of this mattress in the simplified choice thread here. There would be no “red flags” for the componentry used for your weight range.
There are over 500 mattress brands currently operating in the United States, and over 170 boxed-bed mattress offerings, so with thousands upon thousands of different mattresses being offered, it’s simply not possible for me to maintain a listing of every item available in particular price ranges in an ever-changing market. It would be much too large of a task for any one individual or group to maintain.
Phoenix