FWIW, if you think your LCD doesn’t have any ghosting issues try Pixel Persistence Analyzer here http://www.benchmarkhq.ru/english.html?/be_monitor.html
Note that you can have a quite slow LCD and still be able to play. As others have pointed out, how much it bothers people seems to depend a lot on the individual.
I have an “8ms” and can easily see the blurring if I strafe close to a detailed texture for example.
There is also fairly strong evidence that many LCDs introduce a delay completely independent of the response time: http://www.behardware.com/articles/632-1/lcds-images-delayed-compared-to-crts-yes.html
edit:
of course, in response to the original post, there is absolutely nothing et:qw can do to influence any of these things.