We bought a Sleep Number bed. My wife who has RSD did her homework and decided that buying this bed could be quite pricy if you order all the bells and whistles, such as attached pillow tops etc. Over time having extras attached to the mattress ware down within 5 years as all mattresses do. The cost of those extras can double the cost of the mattress. Instead buy the mattress without any extra toppings and purchase a couple of inches of pillow tops/foam separately of your choice. When they ware down simply replace them. Sleep Number is a fancy air mattress with its own separate bottom support. Very little moving parts and no box springs. One can make their own foundation and save, again plenty of cash. For example you could purchase only the plain Queen sized Sleep Number mattress without its foundation and spend only $500 at the most I believe. That mattress will last 20 years. Anyway my wife loves this bed. Never a complaint and sleeps much better.