Get a Memory Foam Pad and You Won't Ever Switch Back to Your Old One
Get a great memory foam pad and you will never think about going back to a different style again. In fact, you will sleep so much better on these that you might not even need pillows. You know of course that I'm just kidding, because you can get them in memory foam as well. This material, that was developed by those geniuses at NASA, has been around for a little while now, but it only gets more and more popular. This is due to the fact that it is excellent.
Now, if you're trying to decide between pads, a topper, or covers, then my advice is to just get the whole mattress. Obviously, sleep is important to you or you would not be doing so much research. You're obviously torn about which one will bring you the ultimate comfort while having the cheapest prices. Will you need to stop worrying about prices right now, because with how good you're going to sleep on this, you will not need to worry about those for a long time because you just don't care.
As for the different types and sizes, you can get 2 inch, 3 inch, or even four-inch. You might find a discount if they have more than enough in a certain size, but don't count on that. Now, if you want to get accustomed size for your bed that is an option, but you usually don't need to because they make them in all the different sizes, including twin, King, and Queen. They're also available in single, double, and full.
As for the review and ratings that you usually used to compare all these different options, I would skip them for now. Typically, they focus too much on things that ordinary people who are just looking for a good night of sleep don't. It's because of that that you're probably an end that just wasting your time and that's not a good thing, is it? So I just recommends that you sell that aside for now and go for the mattress sets that suits you best. If you're going to travel, keep that in mind. If you're going to do something else with it, and keep that in mind as well.