Hi Rachierad,
I would start with post #2 here first which may be helpful.
Based on your comments it appears that you spend at least some time on your side which may indicate than a thicker top layer may be helpful. You could also add a topper in the range of an inch or two to your mattress to increase the thickness of your comfort layer as well but I would wait until you have had your mattress for at least 2 weeks (and preferably 30 days or so if possible) before making any changes so that the mattress has gone through its initial break in period and you have gone through your initial adjustment period as well and then use your experience at that time to either choose either a thicker comfort layer or add a topper if either is necessary.
3" of soft latex would be less risky for alignment than 4".
Phoenix