I am currently using a set of Logitech UE 700s and have been wondering how they compare to the Shure SE425.
I'm not exactly looking for an upgrade. My I've had my UE700 for about a year now, and am starting to worry that it may stop working. Where I live, the headphones you recommended are not easy to purchase (other than TF10).
In all honesty, I would probably purchase another set of UE700 I can find them cheap.
If not for upgrade then try something different in term of soundsignature like warm rich sounding and Klipsch Image X10, X5, Sony MDR- EX7550, Sony XBA4, UE TF10Pro are recomended too and they maybe easier to find localy.
The only one that is easy to get locally which you recommended are XBA4, and TF10. Over here in New Zealand, the XBA4 retails for $400. The price I paid for my UE700 is $150. I'm not exactly willing to spend too much on a new pair.