Should I upgrade, build, or wait?

[DeadSil3nt]

Current specs:

i5 4670k (stock cooler)
GTX 660
8 GB DDR3 RAM
750w PSU

This is my first build, and it's around 2 years old. At the moment, I can run most games on high-ultra settings, but I feel like the graphics card will become obsolete soon. I want to be able to play games like Fallout 4 and ARK Survival on ultra settings (currently running ARK on medium) at 1080p, and I also want to start streaming. I can stream decently with this, but only on low graphic intensity games.

Should I upgrade the graphics card to something like a GTX 970, or should I just build a new pc with the budget at around $1500? Or should I just keep what I have and upgrade next year?

 

[Supahos]

I'd buy the best gpu you can afford now and if you build again in the next 2 years that gpu will still be fine. If its doing all you need it to do now you have a pretty solid build anyway