looking for best compatible GPU

[Raten]

Hello. this is my pc specification:
Motherboard: gigabyte EP43t-USB3
CPU: Intel Q9650
RAM: 16 GB
GPU: Nvidia GeForce 210

I want to buy a new GPU, I would like to know what is the best and recommended GPU for my build. so it should be compatible with my motherboard and CPU in case of the bottleneck problem. please let me know what is the best I can get out of this build and maybe some other medium ranged GPUs.i know it is a very old build but unfortunately, buying a new motherboard is not an option.
Thank you

 

[SkyNetRising]

GT 730, GTX 750, GTX 750 Ti.
Not worth to go any higher than this.

 

[Ramlethal]

I personally think that the very best GPU that your PC can handdle its the 1050 Ti. It wont bottleneck at all
Also you can choose everything that is under 1050 TI as an option aswel... But 1050 Ti its the top perfomance GPU for this PC.
GTX 7XX series are also a good idea btw