We have a very good sprung base ,in excellent condition although 10 yrs old.If I buy a level 4 ie firm mattress does a sprung base make it softer? Hence looking to buy just a natural mattress that you can turn over with no gell or foam content.

I ask because I have several times recently slept on my daughters Monte Carlo Driftwood by Sealy King size bed -level 3 ( she got it from a major bed retailer and it was very expensive ) and her husband is much heavier than her so went for lots of springs )

It was a level 3 mattress with 3800 springs and I did find it was very firm

BUT my back has been much better sleeping on this bed-so should we definitely go for a medium mattress as you suggested - I am a side sleeper -the same as my husband

Pauline