Im new here even though ive been reading the forum for some years now.
I have the above cans and im thinking about a shure se425 lately.
I use the 240 at work now and the hd25 at home and with me outside. (Both cans were good options at the time because i do a tiny bit of music production)
One of the things that made me think of an IEM is the portability of hd25. If you put them to your neck i get a headache after a while (at the back of the neck i mean, when not listening to music because you need to do something else while outside.
(As a long term plan i might want to add some amp or dac/amp in the future that might drive some better cans for home... I dont have a huge budget though)
Are shure se425 worth it if you have the hd25 or im just in the mood to spent money ?