Bunk bed mattress to replace Ikea Morgedal

I am a long time reader of TMU , two years ago i bought a twin kids mattress from My Green Mattress based on very useful information found here. That was for the top of the Matrix kids solid wood bunk bed and now i need to replace the bottom bunk mattress, which currently is an Ikea Morgedal in firm.
This is for my teen daughter, she is a side sleeper, about 176 lb/ 5ft 8” tall . She likes firm but comfortable mattress, she likes to sleep on top instead of caving in and she dislikes feeling of wobbly coils. She also sleeps hot which we solved with a wool topper. Recently she has been complaining about having to shift to partially sleeping on her stomach because the hips are uncomfortable.Because it is a bunk bed i am concerned about weight and height of the mattress.
I went to buy oxygen pillow and while there she tried and liked the feeling of the alpine classic dunlop 1.8 (European sleep works). It costs more than what i was hoping to spend and so i wanted to ask if these mattresses would be reasonable direction to achieve firm yet comfortable feeling for a side sleeper:

Back Science Essentials mattress
Tempflow Serene mattress
Texas pocket spring 8” plush quad coil + Dunlop latex topper.

Thank you for your help!

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