Not grainy then
I can say they are not completely perfect - not sure what to call it, but the cymbal decay is sometimes not quite as natural as my higher end stereo setup. It is not at all raw, or anything to even worry about. It took me a bunch of A/B where I came away more impressed than ever with the X2 overall to even find it - I never notice anything unpleasant.
I honestly feel someone would be hard pressed to not be happy with the X2 for actually listening to music. I stressed for awhile about dropping $300...but came away so happy, I ripped my entire collection to FLAC and have listened to absurd amount of music since. I even bought the little (older) brother the L1 for work (not a bad facsimile for tonal balance with a 3dB cut at 2kHz, just doesn't have the soundstage).