I tried the AKG K3003 and it's not as breathtaking as similar prized iems, er custom iems... the sound is balanced with the regular filter, bass is controlled, mids are slightly forward and they are a bit sibilant. Though I expect them to have airy highs or a grand soundstage like the custom iems but to my disappointment, they don't have. So not a good buy for an iem, maybe it's much better to buy a custom for that money.
I tried them on Stereo Store here and shocked as they are around 1.6KSGD, more than the UM Miracles' 1.3KSGD displayed, which I really liked. Why did AKG priced an iem like that? So I'm still in question with those iems.