not only he should ask, he should flip through the last 10 pages in this thread.
as well as the search button.

Went to ALL IT to test edifiers in Ikano today...very friendly salesmen there...let me test nicely 

Tested M3300, M3300SF, C3, S330, S530

Well for the price, M3300 and M3300SF is really good clarity... but bass wise is very lacking, when bass heavy song the woofer gush out alot of air from the port and cause alot of "wind" sound from the port too.

C3, although cheaper than S330, i still think it sounds much better than S330. C3's treble extension is higher and bass is more punchy, but not loud. The best setting i found in that shop is 6/7 Sub - 4 Treble. Bass is punchy and clear, can hear every note clearly, but is sound quite dry, not much excitement. Not muddy at all with all the songs i throw at it. However at low volume the bass is almost non existent.

S330 on the other hand can provide more mid range detail, like the background crowd in the song Hotel California can be heard clearer than S330, but the woofer seems abit loose and can get boomy at times, often overdo the bass for the songs. Also i cant seem to find the right setting to give me the best balance.. The treble extension not as good as C3 too. I dont know, might be the placement of the speakers but thats what i heard to day

S530 dont need say much, best. Beat every speaker there hands down except its bigger brother S730. Even "THX" MX5021 loses to it