Hi ashbosity,
This certainly isn’t the direction I would suggest (and Serta is one of the manufacturers I would tend to avoid) but of course each person has their own personal value equation and the tradeoffs that are “best” in terms of quality and value for one person may be different for someone else. I would also tend to avoid using reviews as a method of making a mattress choice unless the review includes the specifics of the quality of every layer in the mattress, the specific body type, sleeping style, and preferences of the reviewer, and is written by someone that is knowledgeable about mattress materials and how they compare to each other. A mattress is only as good as the construction and quality of the materials inside it. You can see my thoughts about reviews in post #13 here.
There are likely to be many mattresses that would provide you with good PPP (Posture and alignment, Pressure relief, and Personal preferences) that have better quality and value and may be more suitable for your needs and preferences as well.
I would personally follow the guidelines in the “read first” post I linked so you at least have some good options to make meaningful “apples to apples” comparisons with the Savant (that don’t need a topper to be comparable) before spending $1999 on a mattress that probably isn’t the best quality and value available to you. I would also make sure that you have tested it very carefully and objectively for pressure relief and alignment using the testing guidelines because testing only for more subjective feelings of “comfort” in the highly managed environment of a mattress showroom have less than even odds of making the most suitable mattress choice for long term use in “real life” (see the results of the study here).
Phoenix