Hi Linda, 
 
Thanks for your question.
 
Generally, you want to be looking at a traditional pocket sprung mattress as this gives you support from the spring and then you have the fillings sitting atop those springs providing the comfort layer. 
 
At your body weight you are borderline between a Soft and Medium spring. Your husband is comfortably within our Medium spring tension guidelines. Generally, we find from speaking to our customers that anyone above 9st tends to prefer a Medium spring as it gives a bit more support. 
 

 
You don't really disclose what type of feel your current mattress has so it's difficult to comment definitively. However, maybe go for something with a medium feel, providing a slight sink into that top layer but not too much. It's safer to choose a medium rather than a soft as if the medium is too firm after 4-6 weeks then you can always add a mattress topper to soften it down further. 
 

 
Our Artisan Naturals is a true medium feeling model in that top layer. It also has the benefit of being constructed using 85% natural fillings; Ideal for anyone who identifies as a hot sleeper. 
 

 
 
Any new mattress will take time to adjust to as the spring system nor the fillings have been slept on or compressed. 
 
I hope this has answered your questions fully but if you do have any further queries please don't hesitate to contact our office on 0161 437 4419. We are open Monday to Friday 8am to 8pm and Saturday and Sunday 10am to 4pm. 
 
Kind Regards, Lee.