LCD monitors (TFT, HR-TFT, STN, etc) are usually not ideal for gaming. They all have an issue with ghosting, meaning that an image persists for longer than it should. In fast moving games this can be very distracting.
In AH this effect is not as distracting as other games.
There are some LCD monitors out there (very expensive ones) that are MUCH better than others in this regard.
I think Tom's Hardware
http://www.tomshardware.com was doing a lot of LCD reviews at one point. You may want to take a look there.