kaspq :
AMD Athlon II X4 860K 3.7 GHz Quad-Core Processor
NVIDIA GeForce GTX 1050 2GB GDDR5 Graphics Card
8GB 1600MHz RAM / 1TB Hard Drive / 500W Bronze PSU
with your current system, purchasing one of those cards you mentioned wouldn't be a great idea. Unfortunately, your system will hold back those cards, and you won't see a massive improvement. There will be some improvement in GPU bound games. But once you play anything that requires a good CPU, your system will be found wanting.
For the moment your 1050 is a decent balanced match with your system.