Thanks for considering DLX. With a mattress like ours, you can unzip the cover and adjust the 3" comfort layer, so if there’s any uncertainty, we’d suggest starting with the Premier rather than the LatexLux. The two are identical except for that comfort layer and within the first 120 days you can pay the difference and we’ll send a latex layer so you can convert the Premier to a LatexLux if you prefer.
Based on your height, weight, and side sleeping with hip pain, we’d recommend the 14" Premier in Soft. The 8" pocket coil in the 14" model provides more cushioning for side sleepers compared to the 12", which uses a 6" coil and feels firmer. Unless you have a strong preference for firmer support, the 14" will usually be more comfortable in your profile.
If you can, it helps to know the brand, model, and firmness of your current mattress and any other you’ve owned in the past 5-7 years to better match your comfort preference.
And keep in mind that neck pain is almost always related to the pillow. You want something thick and firm enough to keep your head and neck in a neutral position, which can be tricky if you switch between side and back or stomach sleeping. Shoulder pain can be related to pillow choice too, but also to having enough mattress cushioning to relieve pressure.
On sleeping warm: none of the mattresses you listed are inherently “hot” or “cool.” The coolest mattresses tend to be firmer spring models with minimal padding and low-density foams, since more padding means less airflow. Most “cooling” tech in mattresses like phase-change fabric only works for 10–30 minutes and its effect is reduced by sheets and protectors. Bedding plays a huge role: comforters, duvets, and heavy blankets trap heat, and cotton tends to hold moisture more than synthetics (think working out in a cotton T-shirt vs. a Dri-FIT). Lighter, moisture-wicking bedding and seasonal changes in sheets/blankets often make more difference than the mattress itself. If that’s still not enough, devices like BedJet, Chilipad, Eight Sleep Pod, or Rize SmartDuvet can actively manage temperature.
Bottom line look at the whole sleep setup (mattress, pillow, bedding) for comfort, cooling, and pain relief, not just the mattress.
