UPGRADE TO 1440p G-sync???

[andreaptr]

Hi my name is Andrea and at the moment I play on a 27" 1080p IPS lg monitor using a single gtx 980 (I know the 970 has a better money/fps ratio).
I feel like it's time to buy a new monitor(gaming only)but I can't decide between the Benq xl2420g (1080p g-sync) and the Asus pg278q (1440p g-sync).
Is 1440p REALLY worth it?
Is there much difference between medium 1440p and high/ultra 1080p settings?
-MAIN QUESTION-
Would my single gtx 980 (reference one) be able to handle such resolution allowing me to play smooth image quality(thats why I'm choosing between g-sync monitors)?
If I'm going to buy a 700/800€ monitor, I'd prefer not to have to buy a second gpu

I know these are really common questions , but honestly I've never found good answers to them....

Thank you for your time and sorry for my bad english (I'm from Italy xd)

Have a nice day

 

[i7Baby]

"Is 1440p REALLY worth it?" - yes

"Is there much difference between medium 1440p and high/ultra 1080p settings?" - I gather you're talking fps. There won't be much difference.

"Would my single gtx 980 (reference one) be able to handle such resolution allowing me to play smooth image quality(thats why I'm choosing between g-sync monitors)?" Yes - maybe not in high end games with high settings. Also depends on your CPU and ram eg http://www.game-debate.com/games/index.php?g_id=17084&game=Assassins%20Creed:%20Unity

 

[andreaptr]

CPU i5 4670k @4ghz
8 GB RAM 1600mhz
Mobo MSI z97 g43 gaming
PSU 600w
O.S. windows 8.1
GPU zotac 980 (reference)

Thank you for your answer

 

[i7Baby]

Should be OK. What make and model PSU? 2 x 4gb ram?

 

[andreaptr]

PSU corsair cx600m 80+ bronze
RAM corsair 2x4Gb

So should I go with the 1440p?

 

[andreaptr]

Sorry, when I asked :"1440p med vs 1080p high/ultra" I wasn' t talking about FPS but image qualità. Will 1440p medium resolution still look better than 1080p high/ultra?

Thank you for your patience ;3

 

[i7Baby]

1440p give a better picture - more pixels per inch.