I'm building a midrange pc which I will be using for light 3D modelling , image editing, programming and gta5. Being a visual thinker and having a bit too much spare time I made this graph of components I plan on buying but I want to be sure I'm getting the most bang for my buck. This is my first time building a PC and I'm not sure if I got all the parts I sould've. I did quite a bit of research to build this but as I said I'm no experts so any advice would be appreciated. I'm currently on a $570 strict budget but I will get more money later to further upgrade as seen in the image.
List of components:
MB: Asrock H81M-VG4 R2.0 $52.46
CPU: Intel Core i5-4460 3.20GHz $227.98
PSU: Corsair VS550 PSU, 550 Watt $68.39
RAM: Corsair 8GB, 1X8GB DDR3, 1600MHZ $76.34
SSD: Kingston SSD V300, 120GB $75.42
GPU(next): Saphire HD 7950 3GB DDR5(used) ~$160
GPU(current): Saphire HD 6670 1GB DDR3