Hi manny_me,
The type of material you choose would be a personal preference but I would make sure that no matter which type of mattress you prefer that it uses good quality materials (most types of materials have better quality and more durable versions and lower quality less durable versions). The tutorial post has links to more information that talks about the different types of materials that are used in comfort and support layers and also includes some guidelines for the minimum quality I would suggest for each (such as here and here). The goal of your local testing is to see which materials or mattress types you prefer and this is something that only you can decide.
Following the steps in the tutorial post one at a time will give you the best chance of success 
Phoenix