John Ryan mattress similar to Vi Spring John Lewis Woolacombe

Hi,I was looking to buy a Vi Spring, Woolacombe Superb from John Lewis in the summer as a 'special buy' (Super King, Medium Tension). However, when I went to buy it they'd taken it out of the Special Buys and I was told that it will be back in the sale this December. So before going back to buy it in a few weeks, I thought I'd look around. Can you recommend an alternative please?FYI my wife and I are both around 6ft, I'm 12st and she's 10st. Side Sleepers and we have a sold Divan Base.(Side question - the Divan base is ok but I often feel like mattresses don't support me - too much pressure on the shoulder and hips, no support under the body and legs. Would a sprung Divan help that much or is the mattress much more important?)