What mattress would you recommend for us?

Hello. I'd be grateful if you could advise me which of your mattresses would be best for us.
Presently we have a foam mattress which I don't like because it makes me hot. We have a sprung slatted bed frame.
I am 5'4 and weigh 9 1/2 st
My husband is 5'8" and weighs 12 st
I would like to have a softer feel mattress and my husband is ok with this as long as it's not too soft!