New bed ponderances

During my lunch break, I saw a commercial for adjustable beds. I wonder how comfortable they are. I have a lot of back pain and, when I get up in the morning, I'm very stiff. Supposedly an adjustable bed would help ease my aches but I don't know anyone that has one to get a real opinion. (Sorry, I don't trust 'personal testimonials' that are on TV.) Does anyone have any suggestions for a new bed? It doesn't necessarily have to be adjustable...just comfortable.