I tried both the DT1350 & the HD25 last week and ended up getting the HD25.
The DT1350's build quality is top notch and looks extremely polished and classy compared to the HD25 & the isolation is better aswell.
But when I hooked the Beyer to my rig(Clip Zip+FiiO E11) there was a loud disturbing hiss whereas with the HD25 not a single db of hiss visible.
And I liked the HD25's sound so I got it for €158.
The DT1350 was retailing for €269.
If not for the hiss, would you still have been so unequivocal in your preference for the Senn's?
Also, was there a significant difference in the SQ between the two phones (aside from the hiss)?
I'd appreciate reading your impressions, thanks.