May I ask you something? For what purpose you plan to use your new PC? This is important, because if you don’t know you will probably waste money on something you bought and you don’t use it.
-Games.
-Internet.
-Software development programs (I should be doing a course at university called Computer Games Technology and I will need to do some work at home. Their website says I will be learning to use Java, C, C++, OpenGL, DirectX).

Speakers:
You need home theater (5.1 is enough) or not (2.1)?
No, I don't need a home theater.

I will look into the other things.