Our Dunlopillo Millenium divan bed is now 6 years old and is giving my wife and I really bad back ache. It has two very big indentations in the mattress and I've not really that impressed with it!

I've now purchased a brand new Vi Spring Superking Soverign Divan (a exceptionally good deal) and now need to purchase a suitable SKS mattress. My wife and I recently tried the Vi Spring Tiara Superb at Bentalls and it was amazing but unfortunately so was the price even with the large sales discounts being offered. I've now been offered a Vi Spring (made for John Lewis) ex display SKS mattress - model 'Fyvie' for a really great price (60% off original retail price). Vi Spring have confirmed that this mattress would be ok with my new Vi Spring Soverign Divan (they actually advised that the Sovereign base is a higher spec than the one they would normally use for this model (Fyvie) so it will be fine) but I'm not sure how this Fyvie mattress would compare with the VS Tiara or indeed your Artisian Bespoke 002 mattress. Also is there any extra charge for a zip and link mattress?

Many thanks .