The DT150 would be perfect if it were not for the stupid cable connection to the headset! It's a great shame that such a quality solid product should have such a flimsy connector, although secured by a small screw (you will need a very small screwdriver and hope you find the screw included!) it still seems flimsy & obtrusive when wearing. Such a shame a better design couldn't be made on this near perfect headphones.
The sound quality is everything you would expect from Beyerdynamic, the Dt150 are great all rounders, easily covering playback, mixing, monitoring, with a warm bass, good midrange & audible clear trebles. There is no noticeable sound coloration which is great for mastering basic mixes at home.
To get the best from these headphones 250ohms, I'd probably recommend plugging into a semi/pro desk/mixer or a headphone amp. Just to add that I do plug directly into iMac on occasions and it sounds fine.