Upgrading Graphics Card

[giorgoskid16]

Hello people.
I have a desktop pc with these parts inside:
1) AMD FX-8320 (CPU)
2) NVIDIA GTX 650 OC (GPU)
3) CORSAIR 650W (PSU)
4) GIGABYTE 970 (motherboard)
5) 2TB of HDD
6) 8gb Kingston RAM (KINGSTON)
I have had this computer for almost a year,and i think i should upgrade it.
My thoughts are installing an 128GB SSD disk,and a new GPU.
Also,i use this computer for video and sound editing and gaming. I could use some advice in upgrading it.
I also have windows 8.1 installed,and i read that games and other programs run better in win 7.
I have also got Windows 7 Ultimate 64-bit,and i would consider to install this,if better..

 

[dandn0ten]

whats your budget?

 

[giorgoskid16]

I was thinking about trading my card,and using the money from it another 100$ for the graphics.
Any suggestion?

 

[PC-Noobist]

A GTX 770 if you can find a cheap one from PNY or Zotac they have some good deals