It seems that no one has remenbered a monitor that supports 3D displays, for 3D display games such as crysis. And besides, you have to calculate the size of the monitor plus the resolution enabled, and then make the calculation for how much it represents. Always remenber, use the resolution most suitable for your graphical card. After that, there are more aspect to have in consideration such as truebright, led backlight, glossy(bright colours - inside) or matte(anti-reflection - outside). 500$ should be enough i think. Its up to you to do the research, and remenber when information is cheap, lack of attencion becomes expensive.
Cheers and good gaming.