As mentioned above, 2050's will sound really good with WELL RECORDED music. After some burn in they'll be softer a bit, but sibilance is still present on most of tracks.
Neverheless, good choice for acoustic and classical, but not recommended for jazz music with trumpets (imo) - they will hurt your ears :(
Also this phones are very good for speed and brutal styles of metal due to their fast and detail bass.
In conclusion, i can't say that i'm totally satisfied with this model, now looking for Takstar HD6000 - they have more solid and compact sound.
Oh, and you can also take a look at Takstar TS-662 (open-design too) - many people are very satisfied with them, and they don't have so much "brightness" like 2050.
Hm.. I listen to classical only, so jazz is not something I am bothered with, but trumpets.. My favourite composers tend to use horns and trumpets quite a lot. And I am not going to be pleased if I am frowning all the time I hear any "sharp sounds" in music.
"...they will hurt your ears..." - that's what I call sibilants (I may misunderstand the trerm, though)