Hi Dan1979,
The first place I would start your research is the basic tutorial post here which has all the basic information, steps, and guidelines that will help you make the best choice.
Most of your questions can only be answered based on your own personal testing for PPP (Posture and alignment, Pressure relief, and Personal preferences) because there are too many unknowns, variables, and individual preferences to use a “formula” or “theory at a distance” to predict anyone’s experience on a specific mattress design (see mattress firmness/comfort levels in post #2 here).
Outside of your own personal testing … the most important part of choosing a mattress is to only deal with retailers or manufacturers that are transparent and can tell you the specifics of what is inside any mattress you test. You can’t “feel” the quality of the materials in a mattress but lower quality materials will soften or degrade much faster than higher quality materials and this results in the more rapid loss of comfort and support which isn’t covered by any warranty. This is especially important with higher weights because all materials will soften, compress, or break down more rapidly over time with higher weights than with lower weights.
This would be one option when the needs and preferences of a couple are different but there are others as well. There is more about this in the first part of post #2 here. Which of the options was best for you would depend on your own preferences, sleeping habits, and your testing on each mattress (using the testing guidelines) to make sure it was suitable for both of your needs and preferences.
There is no one material that is inherently “better” than another for any particular person and this is mostly a matter of preference and most importantly the specific design of a mattress and how well it matches your body types and sleeping style regardless of the types of materials and components in the mattress). Every material also has higher and lower quality versions and this more than anything else will determine the cost and durability of the mattress.
[quote]Also, my budget is a light problem. I would love to buy a 8 inch mattress, 2 inch of talalay on a 6 inch core, but no matter how much I researched I could not find anything viable(natural, certificate) under 1000 dolars for a queen size mattress. so my question is, for my weight, is it enough a 6 inch mattress considering that I am a side sleeper? Should I consider buying a base of some springy material to take a bit of the compression so that I don’t hit the hard part? This is my current base:
www.salteleprevi.ro/admin/images-salteleprevi/foto382-2.gif
I know it can’t be compared with a “spring” like base with “elastic” stripes, and is actually made just for providing hard support and air. But I want to know if I need to consider buying a new base and what type of base for allowing me to stick to 6 inch latex mattress, or I rather keep the base and try to find a cheap 8 inch latex mattress instead?[/quote]
You can read more about different types of box springs and foundations in the foundation post here and the posts it links to in the second paragraph. There are certainly some manufacturers that build a “sleeping system” that uses a more responsive base, typically under a thinner foam mattress (either a box spring or flexible slat foundation), which can have a significant effect on how the mattress feels and performs but once again only your own testing and experience can tell which combination works best for you. You are not in a price range that would have many 8" or thicker latex mattresses available to you unless you are considering all synthetic latex. You would be in a price range though where latex polyfoam hybrids would be available.
There is more in post #14 here about the effect of thickness and some of the more common choices. Thinner mattresses with a firm base under it will tend to be firmer and less adaptive than a thicker version of the same material. There are many people who do well on a single 6" layer of a high quality material such as latex or HR polyfoam … particularly if they are stomach or back sleepers which don’t need the same amount of cushioning under the pressure points that are part of side sleeping but once again only your own personal experience can know with any certainty.
I would follow the steps in the tutorial post one by one and choose the best quality and most suitable mattress that I could comfortably afford. I would also put high value in the knowledge, transparency, experience, and integrity of who I was dealing with because this can be one of the most important parts of a successful mattress purchase. My first step outside of some basic reading about the pros and cons of different materials and designs and what to avoid would be several hours on the phone to narrow down the retailers or manufacturers I planned to visit.
If you let me know your city or zip code I’d be happy to let you know of any better options I may be aware of in your area but if I was 7-8 hours away from a store that met my criteria I would seriously consider an online purchase that had good options available both before and after a purchase to make changes or “fine tune” the mattress to my specific needs and preferences if necessary.
Phoenix