Rolled mattress for loft conversion

Hi John & Ryan. I hope you can help us!

My wife stared getting a bad back about 6 months ago. Our Dreams 800 springs/" title="pocket spring">pocket spring double sided mattress is about 6 years old - we weigh approx 16 and 18 stone and are side sleepers. We got ourselves a Soak & Sleep mattress topper as a temporary measure as our minds were blown looking at all the different mattresses. It was a great fix for a while but obviously didn't solve the underlying problem. My wife back has flared up again to the extent that she is on painkillers however think a big part of the problem is the mattress although obviously the weight doesn't help!

The problem we have is that we are on a limited budget and have limited access to our bedroom which is a loft conversion with tight stair turns. So we are now back on the trail of a new mattress. We previously tried a memory foam mattress and it was awful - we didn't get on with it at all. We have found some pocket sprung mattresses that are delivered rolled, which we need for access. The two we found are the ikea Hovag pocket sprung medium firm 5ft King size for £250 and the HomeBargains Premium Cosy pocket sprung rolled mattress King size for £160. Are either of these any good for our criteria?

Or can you recommend anything?

We looked on your site but your pocket sprung ones seem beyond our current means and don't seem to be rolled. Many thanks in advance for your help and thanks for the info on your website. Kevin >