I can't stand anything below 75 HZ. My brother has his 17" Monitor's resolution OVER 1024x768 which only goes to 60 HZ. NOW THAT, hurts my eyes. At 1024x768, it can only do 75 HZ. That also drove me nuts. That's why I let him have that monitor and I have the Dell Trinitron in my room, which does 100 HZ. 100 HZ is perfect for my eyes. 85 is ok. But anything 75 HZ and below drives the hell outta me and my eyes. So, how low is too low for YOUR eyes? How low does it have to get until your eyes start to hurt?