The quality of the beddings must be considered highly. This is to ensure that you are buying something that will last for a long time. It is indeed true that the those with high quality will also cost more but you have to realize that in the long run, you will be able to save a lot if you will buy quality beddings. These are not prone to tearing. Look at the thread count and feel the softness of the bedding.
Super king beds are becoming increasingly popular, but they are only for the bigger room. You spend a third of your life in bed, so make sure that your bed choice reflects both your personal design tastes and is large enough so you can stretch out comfortably.