Do any of you have Dunlopillo - that was one mattress that stood out in my head when I was young as sista, myself and mother slept on it for 10 years - and it was only double.
Also I have only recently heard of FeatherandBlack mattresses. Maybe it would be a bad thing to buy online cos of my pains and aches.
We've just bought a Simba mattress online - it's amazing! If you don't like it within 90 days I think you can just send it back. And I suffer with a bad back too. It's incredibly good.
Maybe I've had a beer too many but; finding it difficult to see what would make the base unsuitable. If sturdy it is surely ok. Heck, one can stick the mattress on the floor and the floor would be fine; why not the base too ?
There's not a great deal of saving in using the old base, also you can be sure that the new complete bed will match in design and importantly, size - not a given by any means. I would recommend a memory foam mattress, but you should always try before you buy! and don't skimp on the expense! you are going to spend one third of your remaining life lying on it.....