New monitor

After getting a new PC i thougt about getting a new monitor.

After abit of research i have found my self these options:

new 24ínch 1080p 120/144hz monitor 200-230€ (added to my ips 21inch and a 38inch tv)

used 24inch 120hz and maybe a second 24inch screen 120€-170€

http://www.ebay.de/itm/Acer-GD245HD-120Hz-3D-Vision-Monitor-3D-Vision-Brille-/261555521348?pt=DE_Computer_Sonstige&hash=item3ce5ec8744

Korean 1440p monitor overclockabel to about 100hz  290€

http://www.ebay.de/itm/New-Qnix-27-QX2710-Evolution-II-Slim-LED-PLS-QHD-Monitor-DVI-D-2560x1440-/251595471329?pt=DE_Elektronik_Computer_Computer_Monitore_Flachbildschirme&hash=item3a944239e1

my graphics card is 280x