Horizon: Zero Dawn & Detroit: Becoming Human are the two i'm looking out for this year.
Days Gone is also one to watch but probably wont be out until next year...
Nice! Agree with what has already been said. 8GB of RAM will be fine for pretty much any game, I've never had any issues. and I personally went for a 650 power supply on my latest build.
If you need any other advice feel free to private message me as building PC's is what i do for a living! I...