Hello, I wonder if you can help. Mattress shopping is soooo difficult, especially when you are prone to a bad back!

We have just bought a super king bed frame, with a sprung slatted base. We have tried several mattresses, but as they are never in the same shops it is hard to remember how they felt. Anyway we have tried several different brands, but keep going back to the Harrison ranges. The 2 main ones that we like are the Beech 4750 and the Nirvana 3000. We tried the Beech in firm in one shop seemed fine to me, but my husband thought it was perhaps to firm, they did not have a medium to try. Then tried the Nirvana in another shop and it was medium, I thought it was okay, but they didn't have a firm to compare to. The Beech is a warmside / coolside mattress, which I think seems a good idea, especially as my husband always feels cold in winter. My husband weighs about 12 stone and I am currently 9 months pregnant and am about 3-4 stone heavier than normal at 16 stone. Not so keen on the one side firm and one side medium as when you rotate we'd have to swap sides of bed!

Apparently all the mattresses we tried were on sprung divan bases, they told me the mattress (whether it be medium or firm) would feel slightly firmer on our base. Is that true?

Also if we get firm and when I loose baby weight in about 6-9 months, will a firm feel firmer as I am lighter, or do these types of springs in the Harrison not make that much difference?

Both mattresses looked at were about £700-£900 in their sales. Any help much appreciated, as I am now getting fed up of looking, and rolling around like an oversized hippo on showroom beds at 9 months pregnant, isn't much fun!!

Many thanks, Sarah. .