Confirm if GTX970 is for me?

[solty]

Greetings

I'm a noobie gamer who is late at joining the club. I have the option of upgrading my graphics card now, but I'm not sure what to get. I've been familiarising myself with new acronyms lately and thus far, the gtx 970 4GB is slightly nudging its 960 (GB) brother out the way, despite my vague understanding that the 3.5GB doo-daa is not really an issue.

My specs:
i7 2770 @ 3.4GHz
Corsair 750 w
16GB RAM
1 Monitor : LG 1900x1080 23' IPS LED
1 TB disk space

I currently play games like StarCraft and Mass Effect, but with my current AMD HD Radeon 5800 series, the noise scares me (I suspect the fans are dying), so I've been holding back on the games I can really play at full throttle. The reason I am not looking at the 960 is because (correct me on this) of its inferior bus (128 bit vs 256 bit) and bandwidth (112GB/s vs 224 GB/s) even though I'm not sure how significant the difference is.

I would like a graphics card to last me a while and is quiet(er). I plan on adding/upgrading my rig as time + money work out. Any thoughts before I splurge?

 

[g1abhi]

https://www.youtube.com/watch?v=0mP0LW0VV-s
This is the difference between the 900 brothers. In Battlefield hardline the effect is more noticeable (970 gives 20 fps jump from 960).
For a quiet graphics card and long lasting , gtx 970 is the best since the fan turns off below 60 degrees . And it can play everything at over high settings over 60 fps for the next 2 years for FHD.
If you never noticed the details in high and ultra , then the 960 is for you, but i doubt that with a 23" monitor.