Wanting a really comfortable bed and potentially found your products. We've seen and felt a competitors product (Hypnos Orthos Cashmere) but if we can do better we would. We are looking at your Artisan Luxury Super Kingsize mattress to go on an Original Bed Co Glenshee frame. I am 5'9" (82kg)and my wife 5'2 46kg. We've had zip together mattressess before and not been happy with them, tending to find ourselves rolling to the middle ground!!! Neither of us have any particular ailments and we currently have a blindcarft ortho mattress from many years ago. Its very firm and took some getting used to, but it never feels/felt luxurious. Its difficult making decisions without seeing/feeling the product, but yiour guide has been the most helpful and comprehensive so far. Would a Medium spring tension in the range mentioned be what we are looking for? Also, we are in the far North of Scotland, so I'd like some infor on delivery - we might find it difficult to get upstairs due to the weight and bulk of the item - ideas? Thanks, Richard