I been researching for a bit and going a little crazy. Me 185 5’7" hoping to be 150-160 in the near future. Back sleeper. Wife 135 5’2" mostly side sleeper but also back sometimes. Currently have a hybrid mattress from Amazon. Its bothering my back a little bit and I never really liked it because it has like zero motion isolation and doesn’t feel like memory foam. My son has a nectar classic mattress and I like the feel of that one, however I feel like I lay on it and then sink down to I guess the hard foam below. We tried a Zinus memory foam mattress when we got this one which I guess was about 5 years back and it wasn’t like the nectar, the foam you sank in but it still felt hard and you could barely move on the mattress. We like the feel of the hotel mattresses like Four Seaons or whatever. Not sure if I can have feel like that and also memory foam hung. I been looking at so many different mattresses that I have brain exhaustion. Top picks right now I think are the nectar premier hybrid, Silk and Snow Hybrid Plush and Maybe the Amerisleep AS3 in hybrid or foam. I think the silk and snow might be my top pick, but a bit concerned about people saying you lose area around the edges and not sure how well it will do for back sleeping in the plush version. It would be a king bed. sorry if this is not the correct section.
My opinion is to try a nest and wild hybrid. I bought one for my parents for under $1000 and they love it, and so do i. The website isn’t flashy and that made me originally skip over it when i got my first mattress because i didn’t know anything about mattresses. But trust me on this, if you try it you would be in love with it like i am. When I learned about how foams respond and the qualities of base springs and different makes of covers, I looked back again and realized the quality of product you get for the price is fantastic.
Hey robl45.
Welcome to our Mattress Forum 
Hitting the “analysis paralysis” stage is so normal when mattress shopping, especially because - in your case - you’re trying to combine the deep contouring hug of memory foam with the buoyant, responsive luxury of a Four Seasons hotel bed, which are actually two completely different styles. Hotel beds traditionally use a heavy-duty coil core topped with plush polyfoam and fiber which is why you feel supported on top of the bed and can move around easily, unlike traditional memory foam that can leave you feeling stuck or sinking right through to the hard base foam underneath.
Looking at your top picks, the Silk and Snow Hybrid Plush is a pretty good fit; at 185 pounds, a plush memory foam hybrid will likely cause your hips to dip too much for back sleeping, and the weak edge support will make a king bed feel smaller when you roll toward the sides. The Nectar Premier Hybrid has a thicker comfort layer than the classic so you won’t bottom out as easily, but it still leans heavily into that slow-moving memory foam sink that runs counter to that easy-to-move-on hotel vibe.
The Amerisleep AS3 Hybrid also makes a lot of sense because their foam contours like memory foam but responds and recovers much faster, giving your wife pressure relief for side sleeping while keeping you from feeling trapped and isolating motion way better than your current Amazon bed.
Outside of the folks on your list, the Nest Owl from Nest Bedding is a fantastic place to start because it uses a three-inch layer of Talalay latex over pocketed coils, giving you good responsiveness and excellent motion isolation, plus it features a zippered top so you can easily swap out the foam layer if your comfort needs change as your weight drops. True factory-direct builders like @Arizona_Premium or @Sleep_EZ are also incredible options because they use high-spec, durable materials and allow you to customize the firmness levels for each side of a king bed, meaning your wife can have her side-sleeping pressure relief while you get solid back support.
NikkiTMU