We have a Kingsdown and a novaform foam topper.
We recently got the purple mattress adjustable bed. I highly recommend it. With it and my electric blanket I can get some relief each day.
We have a Therapur memory foam topped matress with springs somewhere inside as well. It is wonderfully comfortable but hasn't done anything for my pain at all but that may just be me - I do sleep very well though x
I would really like to know the answer to this too. What type of mattress works for you with fibromyalgia????