Hi raji,
All of the materials you listed are high quality and durable materials (2.5 lb polyfoam and Dunlop latex) that exceed the minimum guidelines that I suggest in the quality/durability guidelines here. I would want to know the blend of the Dunlop (just to make more meaningful comparisons with other mattresses) and I would also check to make sure that the layer thicknesses you listed add up to the thickness of the mattress (or are within an inch or so) so you can confirm that there are no missing layers in the comfort or quilting layers that could affect the durability or useful life of the mattress.
If you have confirmed that these are all the layers then then there would be no lower quality materials or weak links that would affect the durability or useful life of the mattress and if this is the case then any of them that you have also confirmed are a good match for you in terms of PPP and all the other parts of your personal value equation that are most important to you would certainly be worth considering.
Phoenix