I think the 380's are supposed to be the more 'accurate' ones, but I'm not sure if that's true. I have the 280's and they're good for tracking. I got them specifically for tracking bass. They have pretty good isolation, but then I haven't had much to compare them to. I have the Beyerdynamic DT-770 headphones also, and they are much better for 'monitoring', if you're going to try to mix on headphones. The traditional wisdom says that you can't mix on headphones, but that rule was created when people listened to music mostly on home stereos or in the car. Now most music is heard on ipod earbuds, so, unless you're creating music for film scores or video games, I don't think the old rules apply anymore.