I bought the Sennheiser HD 598 to replace a broken Shure 440 with 840 ear pads. Not really sure if I want to keep them, hopefully Amazon allows me to return.
Complaints (or general thoughts)
-- I knew these were open cans, but somehow it seems to make outside noise even worse than with them off, if that's possible. I can hear my computer fan and typing on the keyboard even more clearly with these on. I live in a relatively noisy apartment building but even with almost complete silence the sound still leaks in, which I'm not used to --- or liking.
-- It sounds very muted. Very quiet. There's no punch to anything, it's just flat, but not in the good way because they're not closed, so it's just flat sound all around you instead of for critical listening.
-- They aren't that comfortable for me. I have a Bose AE 2 (I got them really cheap, so I don't care if they're overpriced), and it's hard to go to these. And while the sound is better on 598 (more detailed), I think I prefer closed headphones so I can concentrate on the sound.
-- In the proper conditions and with high quality music (certain genres), they sound great. I was listening to a Tim Skold record which I didn't care for at all on other headphones, but it sounded really good on these because of how much lost detail there was. But this isn't apparent if you have any noise in the room.
-- Not liking the velour ear pads, just personal preference.
-- Shure 440 are way more exciting, although more fatiguing -- and a little more uncomfortable. Still they were cheaper and when they weren't broken they sounded pretty good, and for half if not 1/3 the price.
Maybe I need to give it more time (had these for 3 days). I know I like them more now than I did 3 days ago, in which my impression was almost all negative. But I'm leaning towards returning these for the M50's, although I hear they aren't as comfortable.