There is no input lag with the Korean monitors with dvi only imput. I've played some of the recent beta games, Diablo 3, TERA, Path of Exile and Guild Wars 2. Played them in a window and I did not experienced any lag in the games. There is also no ghosting playing these.
Again, why would you folks buy a monitor with 1440p resolution to play games in a .............. window?
Admittedly, no matter what monitor any of us chooses, we all have to make compromises. To be honest it ticks me off. The industry can certainly do better.