Nope, I own JVC FXC51, JVC FX500, JVC FXD80. I've tried the JVC FXT-90. I also own the JVC HA-S500 (headphone).
The impressions of the FXD70 seem good in that it may have the better FR, mids etc., but tomscy2000 said something like it's less airy or more closed-in sounding, which makes sense since it's not vented like the FXD80, so I skipped it.
Then again, I don't think the JVC FXC51 is vented, and despite it's flaws I quite loved that IEM too! Only after using an equalizer and pretty much only with psytrance music, though.
I remember back when user "Katun" was saying it's better than the Ultrasone Pro 900 after eq, and all kinds of comments like that, I picked it up and found it was really good after eq too, fun times before the FXD80 existed.
Ok, thanks. I have the 70's, and now that I got my R1's foam tips on them, they sound quite great to me (the foam tips help me get a deeper insertion, and they dampen the highs and bring out a bit of bass). Having said that, the xba-3 is the iem that I will never be selling (which tells you how much I think of them!).