Computer is more and more common in our life. Buying a computer is something happens every day. How to pick? Is it the more expensive the better? I don't think so. In my opinion, before buying a computer, you have to figure out the purpose of your computer, such as, for playing games, for work, for designing or for study. Different purposes will have different requirements for the computer. So, do say that you don’t know how to choose. You have to know what you want. Then follow your will, listening to the advice up to your need.