still this 120HZ monitor has the lowest amount of ghosting of all panels
http://www.digitalversus.com/article-358-4495-36.html
The 120 Hz mean that it has half the ghosting of the fastest LCD that we’ve previously tested. Impressive!
sidenote: this is from actual testing the website did!
basic method: a camera taking photos with very high shutter speed
however whether this is worth it or not is really a question of taste
if I had the money I'd buy one personally and just to use 120Hz no 3D ...
I find myself quite sensitive to movement irregular smoothness, however I don't the fucking know if I would really feel the difference (I said "feel" on purpose here)
What is RTC and why is it important?
Response Time Compensation aka overdrive, a method to speed up LCD reaction time by changing voltage past the intended value for a short time
a good RTC will halve response time, remove ghosting and produce no reverse ghosting