I am ~200lbs and 6’1" side sleeper most often. My partner is around 5’8" 120lbs - same sleeping position.
I do not like feeling stuck in the mud and I would like to avoid fiberglass all together.
I would recommend a Certa Perfect sleeper for a side sleeper! I
I bought mine like February, it is now August … at the time of purchase I weighed 245 lbs ( now 202) and my wife is like 135 lbs. We both are side sleepers. This mattress we have had for 6 months and we absolutely love the thing. It was a budget mattress, but it holds up great! No sagging after 6 months, firm, comfortable, it conforms to my body when I lay on my side. I absolutely love it. My wife and I sleep 200% better on this mattress than or old 40+ year old mattress we threw away. A lot more comfortable at night, better night sleeping, I just love snuggling up to this mattress at night.
There are a few budget-friendly mattresses our there that would be on the medium to medium-firm sides worth checking out! Our company (GoodMorning.com) offers the Juno and Cherry mattresses, which are both medium-firm and are less than $500 for a queen. Others that are worth checking out include IKEA’s Morgedal and the Mira Bed.
Whatever you choose, we hope you find great comfort soon!