I have been sleeping on a twin Tempurpedic for about three or four years now. I've decided to buy a new bed since the twin isn't going to cut it for much longer, so I am looking for a queen. At first I decided against buying a Tempurpedic just because the queens were so expensive.

I am mostly a side sleeper; probably something like 65% of the time on my side, the rest on my back. The tempurpedic I have works pretty well in the sense that I don't wake up with back or shoulder pain depending on how I sleep. Recently I hurt my shoulder - I pulled it or something like that. This morning when I woke up after sleeping on my tempur I had no should pain at all. Later I went to a mattress store to try out a bunch of different spring mattresses. I laid on quite a few Sealy and Stern mattresses. Even after laying on them for just ten or so minutes my shoulder was hurting a lot. I'm also afraid that I've slept on a tempur for so long that it would take too long for my body to adjust to a spring mattress. So I'm afraid that if I buy a spring mattress I will wake up sore regardless, just because my body is used to the tempur.

Because of this, I've decided to buy another tempurpedic. However, I can't remember what kind I currently have. It's white-ish like the classic I saw in the store, but I dont' know if Tempurpedic has changed their color schemes recently.

Here is my final question: What is the main difference between the Classic and Delux? They felt basically the same in the store, so I just wanted to come here and ask opinions on this. Thanks!