I don't know if we will break down and buy a mattress right away, but I am wanting to replace our old set.
As far as the 'Air' type beds, like the select comfort sleep number...
Check out this mattress!!!
comfortdirect.com
It has many air chambers, not just a blow up air-bed. And, it comes topped with the visco-elastic memory foam. I think it might be worth looking into! Check out their 'comparison' pages.
I would LOVE to hear from anyone who has one of these mattresses,
My big complaint with my mattress, which is several years old now, is the 'hammocking' effect. It has lost its support and is too 'soft'. The 'Hammocking' is the industry term for when the mattress starts to get soft and sag in the middle after a few years. I do not think a regular air-bed would be good for me at all.
As far as regular spring mattresses... It is harder to know what you are getting. I know that many Simmons use only the 15 gauge springs (the lightest wire....) I have sat on many in the showrooms that bounce like a trampoline!!!
Sterns and Foster is known for being the maker that uses the heaviest gauge springs. These will offer more support, and will last longer. They come recommended for heavier people.
I recently saw a set of Restonic mattresses that I really liked!!! NO sagging or bouncing!!! Tons of support, and topped with a layer of visco-elastic memory foam. Felt great! And, it was cheep!!! Only $699.00. So, I am going to look into Restonic mattresses to see how they are constructed and how long they are supposed to last.
One of the BEST mattress sites that I have found, with great information, evaluations, life-expectancys, etc.. is
us-mattress.com
Check it out!