I have the 1st gen and the Pros. The 1st gen lasted 2 years on the mark until they started switching off without warning. I used them for music/audiobooks/calls. Now, i cannot really count on them for anything so i use them when i get (rare) gsm calls. I got a pair of 40€ airbuds from amazon wirh great battery life and sound(although i use them just for calls - i am in calls 10h per day and use just one at a time) but i cannot pair them to more than 1 machine. For other cases i use the pros.

I stopped traveling with my ath m50s when I got a half decent pair of noise cancelling cans.

The hd-25 are not noise cancelling, but they have such a good attenuation that I can easily use them as a hearing protection when I forget mine when at band practise with a loud drummer.

This might also be the reason why they are quite popular with DJs