I used to love me some earphones...until I came across big headphones.
But anyway, I actually wouldn't pick TF10 over the FX-700. It is bulky and not very ergonomic, plus it is so much more sensitive to different output impedance of the amp/DAP, as compared to something like the Westone 4 or the JH16. Unless you can get it for $99 on Amazon, IMO there are better options out there. If isolation is all you want, an Etymotic will can block out all noise (at least for me).
Among all the earphones that I have gone through, sometimes I would think....should I have kept the FX-700?
I can only hope that one day JVC Victor will release a successor to the FX-700, with a smoother treble, and a fuller midrange.