Hi crash68,
Their site doesn’t indicate that they carry King Koil (only Sealy, Stearns & Foster, Therapedic, and Pure Latex Bliss) but I’m certainly a fan of mattress/topper combinations for a sleeping system where the topper is a high quality and durable material (which yours is), when you can test the combination in person for PPP, and when the mattress uses either higher quality materials in the comfort layers or has minimal amounts of lower quality materials (see post #6 here). This combination has some of the advantages of a component mattress where you can just replace the comfort layer without replacing the whole mattress when and if that becomes necessary and the topper can extend the useful life of the mattress underneath it. If you can test the combination in person then it doesn’t carry the additional risk of having to guess about a topper that would be the best match for the combination of both your body type and sleeping positions and the mattress you are using it on so it can certainly be a great way to customize a good quality sleeping system that works well for you and has no “weak links” in terms of durability.
All of the components you have listed (12.5 gauge innerspring, 2.5 lb polyfoam, and a Talalay latex topper) are high quality and durable materials and there would be no weak links in the sleeping system you chose so I would agree with you that it would make a good quality/value choice for a sleeping system. If you also have the KK heavy duty foundation underneath this then I would also agree that it would hold up a house.
Yes … you have "interpreted everything very well and I’m impressed with your research and the approach you took with finding a “sleeping system” that matches all the parts of your personal value equation that are important to you and I’m also impressed with the knowledge and service that you received at Mattress Mart (and I’ve added a link to this thread to their listing in the Portage list here). Your experience goes to show that along with some basic research … who you deal with and their knowledge, experience, and integrity can be one of the most important parts of a successful mattress purchase.
Most important of all … and assuming you decide to pull the trigger … congratulations on your new mattress/sleeping system. I think you did very well
I’m looking forward to any feedback you have the chance to share when you’ve had the chance to sleep on it for a bit.
Phoenix