New computer for programming

Hello!

I am a high school student here from Slovenia (Country in middle Europe). I have my own laptop I use for school & programming & playing Minecraft, but unfortunately, as I got into Unity 3D game programming, my computer wasn't the best. At the start, everything was going smoothly, but as I tried to for example running a lot of objects in Unity, everything was starting to get laggy. So I am asking for a couple of people, that would donate some money to me, to buy a decent computer with a decent graphics card to last for a couple of years, any bit would help! :D

I am collecting a total of 450 €!

My current PC specs:

- 8 GB DDR3 798MHzram

- i7-3520M CPU 2.90GHz

- 1GB AMD Radeon HD 7570M

Many thanks, Domen!