alarmatwork If you are using mainly Apple hardware it might be that you have problems with dithering as well. I used MBPs for the last 5 years and always had issues with them. Sometimes more bearable, sometimes less.
Now that I am using Windows again (Windows 7 to be exact) I realize how bad dithering in Apple products is for me. So first it would be important to know what causes you strain (PWM, LED backlight, dithering/FRC). For me it is certainly all of them to different degrees.