So I've just pulled the trigger thanks to you guys. My wallet is empty but I gotta tell ya that I'm HAPPY and I don't regret a tiny bit!!!
My first impressions of the FXZ200:
Out of the box bass was a bit uncontrolled and boomy. I wasn't able to hear much detail out of these. Treble lacked finest resolution, since the bass was the most prominent frequency and was bleeding into the other frequencies. They sounded a bit muddy.
24 hours later they were sounding much better with tighter bass and very good treble and detail. Bass no longer bleeds into the rest of the frquency spectrum
50 hours and they almost reached the sweet spot. The kelton subwoofer shows what its worth, its just incredible the quantity and the QUALITY of the bass and there's lots of details coming from my XO2, that I never heard before from other IEMs. My IEM collection includes SM3 V2 and Westone 4 (the ones I used mostly). They're all for sale. Tells how good these FXZ200 are. Seems that these bad boys have 3 separate speakers such is the separation from bass, mids and treble. Instrument separation and imaging are superb, 3D'ish.
More impressions after the 100-200 hours.