It's getting downvoted because suggesting that people avoid an entire brand based on certain types of music is asinine.

I love many types of music including dnb, hip-hop, dubstep, and electronica, and I'll take my various Sennheisers over some Beyer DTs any day of the week.

Calling the HD600s sharp is a new one, by the way - in terms of treble they're nowhere near as hot as the DT880 or DT990s. Maybe it's the upper mids you don't like? If so, that can mitigated with EQ.

Anyway, this hobby is largely subjective - what works for you won't work for others - so you're right in that it's more important to test out headphones for yourself rather than rely wholly on the advice of internet strangers.