Hi zshguru,
I’m not sure how heavy you are but if you are well over 200 lbs then I would consider minimizing the use of 4 lb memory foam and using a higher density memory foam (5 lbs plus) and a higher density base foam as well. This is a great quality/value choice for more normal weight ranges but I would avoid a mattress like the Cloud Luxe or something similar for higher weight ranges. The Allura or a mattress that used higher density memory foams could make a much less risky choice. The sister company to Dreamfoam which is Brooklyn Bedding has some memory foam options that would probably be more suitable for higher weight ranges (with less 4 lb memory foam and higher density base foams).
Just in case you haven’t read it yet … the tutorial post here has all the basic information, steps, and guidelines that can help you make the best possible choices and also includes a link to some of the better online memory foam options I’m aware of (including Dreamfoam and Brooklyn Bedding) if you prefer to purchase online vs locally.
Phoenix