Hi Kleinman-Green,
I can’t see a Sensus King that sells for $1800 on the sleepwarehouse site.
All of the rest are in what I would call the “good value” range and use high quality materials for their budget range. Once you have eliminated all the worst options and you are down to “final choices” between “good and good” then value is really a matter of each person’s personal value equation and all the objective, subjective, and intangible parts of any mattress purchase that are most important to each person. These can include the type and quality of materials and components (based on durability or performance), the benefits of the type of mattress construction and design of the mattress; your confidence in the suitability of the mattress; the type of help, guidance, and service provided by the manufacturer or retailer; the reputation, knowledge, and experience of the retailer or manufacturer and your trust in what they tell you; the exchange or return options you have after a purchase and any costs involved; any extras that are included with the mattress; the price you are paying compared to other mattresses that are similar; and anything else that is specific to the mattress or the retailer that may be important to you.
With an online purchase (and to a lesser degree with a local purchase) many of these can’t be quantified with any specific degree of accuracy so the combination of factors that are part of each person’s personal value equation are really a matter of “best judgement”. Once you are down to choices that have eliminated your worst options though and as long as none of the mattresses have any obvious weak links in terms of durability and you have accurate information about the materials and design and the potential benefits to you then the odds of making a “mistake” in terms of quality or value are much lower and the risk is mostly limited to the suitability of the mattress and the recourse you have if you need to make any changes or exchanges or do any “fine tuning” to fit the mattress to your specific needs and preferences in terms of PPP (Posture and alignment, Pressure relief, and Personal preferences) or in the worst case return the mattress if that’s an available or realistic option.
Phoenix