i bought these jays for 100 bucks, i've heard grados, but it is long time ago, and with different player. sound of grados was perfectly airy but something was missing, everytime i put c-jays on my ears i am satisfied
for that characteristics: i use medium pads, so part of sound depends on them, the style of sound is partly like PortaPro, only in the way that they plays every tone like it could be the last one in their life(rest of sound characteristics of portapro isn't there, fortunately), dynamics is perfect, i was using last six month q-JAYS, really good IEMs, i think c-JAYS are even better, with "q" some kind of music, like nightwish, wasn't really pleasant to my ears, with "c" everything fine. "c" have bass as it is thought, sometimes tight, sometimes wide and soft. middles are fine, interesting, i don't know how to describe it, highs are not as crisp as with largest pads, but they are still really good. unfortunately you almost can't use these JAYS with iphone or something like that, you hear every small difference between mp3players, it is same feeling as was when i tried to use sennheiser cx300 after two months of using q-JAYS, feeling that you have to turn it off, cause it is really pain for your ears and mind.