12 to 17" 4k monitor is completely pointless.
At those sizes a normal FullHD or 1920x1200 panel will do you the same service - and cost much less and require much less powerful GPU to drive (battery of your laptop will thank you!)
At those sizes a normal FullHD or 1920x1200 panel will do you the same service - and cost much less and require much less powerful GPU to drive (battery of your laptop will thank you!)