Most Sony products... The older ones are good. Their new headphones just suck, and the build is sub-par. A pair of new 200$ Sony's feel like something that's 40$. Also, ath-m50x's, m-audio q40's, and a bunch of other headphones that get mislabeled as "Bass Cannons"
The last high build quality Sony that sounded good was the MDR-Z1000. At least of the Sony cans I have seen lately.
If you ever get a chance.... portable, well built, easy to drive and isolate (in both directions) very well. Very much miss my pair.
We always let one get away....