Downsampling vs 'True' Resolutions

[Closet_Noob]

I'm looking to upgrade my set-up within the next few weeks. Probably (finances permitting) to a new GPU and monitor.

Currently using a 2GB 7870, but I want to move up to 1440p, so a new GPU will definitely be required.

I'm basically wondering is the move from a 1080p to 1440p monitor worth it in terms of the extra clarity? My alternative is to keep my current monitor (23" LG IPS 23EA63) and downsample from 1440p, thereby only needing to buy a new GPU.

I currently downsample some older games and I can see an improvement, but having not seen a 2560x1440 monitor in person I don't know how this compares to the actual resolution.

Any advice appreciated.

Thanks

 

[Closet_Noob]

Thanks for the replies, you have convinced me that a higher resolution screen is the way to go.

I am also tempted by the 21:9 2560x1080 displays though and then maybe down sampling from 3440x1440 if possible (unfortunately I can't afford the 34" LG at this native resolution, so this is a compromise). Would this be a viable option or should I just go with native 1440p?

GPU wise I will probably be upgrading to a 780ti or 290x (or slightly lower versions).