Hi Kep!,
Outside of Tamarack’s great comments and suggestions (thanks tamaracks :)) … I can add some additional information and links that may also be helpful (some of which you’ve probably read already from reading the tutorial).
Post #3 here and the posts it links to has more information and guidelines that will be helpful for those that are in higher weight ranges.
There are also some suggestions in the first part of post #2 here that will be helpful for couples that have very different body types and have very different needs and preferences.
While I can’t speak to whether any of these will be a good match for you in terms of PPP (Posture and alignment, Pressure relief, and Personal preferences) because the only way to know this would be based on your own personal experience (see mattress firmness/comfort levels in post #2 here) … I can certainly make some comments about the materials in each mattress.
This topic also has more about Casper, Leesa, and Tuft & Needle (and some of the other new entrants in this category as well).
Brooklyn Bedding uses 2" of blended Talalay latex over 2" of synthetic Dunlop latex over a 6" 2.0 lb density polyfoam which are all very high quality materials and it’s unusual to find 4" of premium foams in a mattress in this category. Their 2 lb polyfoam base layer is also a higher density than the norm in this category and these materials would all be suitable and durable enough for higher weight ranges without any “qualifications”.
The Kiss mattress by SleepEZ uses 1.5" of blended Talalay latex over 1.5" of 4 lb float foam which is a high performance polyfoam that has some of the properties and contouring of memory foam without the lack of resilience and slow response of memory foam over 7" of 2 lb polyfoam which is also a higher density than the norm in this category and would also be suitable for higher weight ranges without any qualifications.
Tuft & Needle uses 3" of 2.8 lb polyfoam in the comfort layer which would be suitable for your weight range but also uses 1.8 lb polyfoam in the support core which would be a little lower density than I would be comfortable with as well (I would generally look for 2 lb density or higher in the support core in your weight range) but since only the deeper layer is a little lower density than the guidelines I would suggest for higher weight ranges it would be a little less risky than most of the others that also have some medium quality/density layers on top of the support core as well.
The Love Bed by Nest Bedding uses 3" of convoluted synthetic Dunlop over a 7" 2 lb convoluted base layer which are also higher quality/density materials than you would normally find in this category. It also has a quilted cover with 1" to 1.5" of polyfoam in the quilting. These are all high quality materials that would also be suitable for higher weight ranges without any qualifications.
Casper uses 1.5" of synthetic latex in the top layer but has 1.5" of 4 lb memory foam in the middle layer and a 1.8 lb polyfoam base layer which are both lower density than I would be comfortable with in your weight range (although they would certainly be suitable for lower weight ranges than yours).
Leesa (see here) also uses 2" of 3 lb memory foam which would be a weak link in their mattress IMO even for weight ranges that are lower than yours…
Yogabed uses .75" of 5 lb high performance polyfoam but the next layer down is 1.75" of 4 lb memory foam and a 1.8 lb density polyfoam base layer which again are both lower densities than I would be comfortable with in your weight range.
4Sleep uses 1.5" of 3.5 lb gel memory foam over 1" of 3 lb high performance polyfoam over 1.5" of high performance polyfoam over a 7" 1.8 lb polyfoam support core. While there would be no weak links in this mattress for more average weight ranges (lower 200’s or less) … with the 1.5" of 3.5 lb polyfoam and the 1.8 lb polyfoam in the support core these would be lower quality/density than I would be comfortable with in higher weight ranges such as yours.
The better options I’m aware of in and around the Bloomington, IN area are listed in post #2 here and the Indianapolis list that it links to as well.
The tutorial post also includes several links to lists of the better online retailers and manufacturers I’m aware of (in the optional online step) and many of these make mattresses that would certainly be suitable for your weight in terms of the quality of the materials and some also have side by side split layers available as well.
See the previous link and post #2 here also has more about the different ways to choose a mattress (local or online) and how to minimize the risks involved with each of them.
Online can certainly be appealing to many people as long as you realize that the only way to know for certain whether any mattress will be a good match for you in terms of PPP will be based on your actual sleeping experience so the options you have both before and after a purchase to customize your mattress or exchange it (or return it) will likely become a more important part of the “value” of your purchase. There is more about the most important parts of the “value” of a mattress purchase in post #13 here that can help you make more meaningful comparisons between mattresses and there is also more about the pros and cons of an online purchase vs a local purchase in post #2 here and this topic.
Phoenix