Having a LG L2000CN here. No flicker at all and no motion artifacts neither, You won't regret swapping, but do get a decent one.
I would recommend 1920x1200 aka 16:10, imho the nicest ratio.
Samsung 2443BW is a good and fairly cheap choice.
There are myths out there reg. 120HZ -
should be good for very fast fps games, but it's a myth
Think it's AnandTech that has some threads about 120Hz mythical monitors.