I'm thinking about getting one ep630 during this PC fair since it's cheap. But this micro phonic effect is making me think twice... I'm owning a she9500 and I think the sound isolation is acceptable, although the KSC75 has better sound quality (sound stage and clarity) compares to it.

lAh0S, it's a mistake to invite "him" to test out Edifier during PC fair. Every vendor there was turning the bass and volume to the max and how do you convince people to believe that Edifier sound is more superior?
I guess the Edifier's customer you're getting during PC fair are those that have already decided to get an Edifier, rather than those "look-see-look-see".
On my way to PC fair last evening, I saw two people carrying their new speaker. One is VS4121, the other one is Sonic Gear. Too bad that Edifier is not a speaker than can be tested/compared fairly under those PC-fair noisy and sound-polluted environment.