You can buy other monitors that have better pixel response times; the Formac 2010 is a 20" LCD that has a 15-25ms response, which is supposedly blur-free.
No, it's not difficult to play; like I said, an annoyance. Just like I turned off the blurring in GTA: Vice City, I wish I could get rid of it on the Power Mac. But, as I also said, I don't have a Pentium 4 2.66GHz w/2GB of RAM and a Radeon 9700 Pro to <b>not</b> play Q3 on.
I'm extremely happy with the 20" display (think of having USB and power and the digital video signal all going through one cable - very very nice), and as I said, I'll probably buy another one. The image quality is great, I had exactly zero dead pixels, and it puts off practically no heat. What's not to love?