So i bought 27inch samsung monitor....
 

Since most people voted for samsung monitor in this thread:
https://gfy.com/showthread.php?t=976844
i decided to buy it.I managed to install it,now i just need to set tv channels and audio in.
But i have some questions:What resolution will be best for this monitor?
How far monitor need to be from eyes?Is there anything else what i should know?

usually 1900x1200

For some reason max resolution is 1280x1024.Do i need to install monitor drivers for bigger resolution?

Should be something on your motherboard disc for graphics that will fix that.

Should have a native resolution of 1920 x 1080. Are your video card drivers up to date?

I got resolution 1920 x 1080 available after installing monitor drives,but when i select it i get "this mode is not available".I going to try to update my graphics drivers.

what type of video card do you have? gotta make sure it supports that resolution.

i got the samsung t260

25.5"

they are nice

This.

Go to your graphic card's website and download the latest drivers to support the higher resolutions.

Actually i managed to get resolution by opening ati catalyst,which is driver manager for my graphic card.But the problem is,picture is damn sharp,and i getting headache of it.What should i reduce in settings to get rid of sharp picture?