DT880 Pro owner chiming in. I got mine used off of ebay for $160, and I've seen them go for less. And for that price? I love them to death! I find myself wishing though that I had a set of DT990's instead, because of how much more lively I believe they will be based on many, many reviews. The HD600 is NOT worth that price premium...for that you could find an HD700 or a HE500 from Hifiman that would completely change up the sounds you've got. Or, better yet, a used HD600 and a good OTL amp!
From the generas you listen to, and since the HD600 is out on price, my recommendation would either be the DT880 or 990, whichever you can find cheaper. Feel free to shoot me some songs you like, and I'll let you know what they sound like and how they compare to the rest of my collection.
I paid about $220 for my HD 600, the one that's on my head at the moment! An the DT 880/990 run for around $170 or so, so about $50 between the two
though as MUCH as I LOVED the beyers [I upgraded to the HE 4, which is like... a Super DT 880 [I'm DT 880 Pads on my HE 4 too
] I will state that the HD 600 is a different animal all together from the Beyers,
headphone like the Beyers and my HE 4 are very articulate, very subtle, tactile, very transparent and a touch aggressive [a sound I like btw], where as the HD 600 is laid back, Euphoric and very just smoooooth
THE Beyers will DESTROY poorly mastered or low quality music, where as the HD 600 will keep such crappy music still sounding amazingly mellow an laid back
so, the two headphones are pretty distincitve, I know what Sound I prefer, bright, aggressive and tactile, how ever I can appreciate the other side and I know that not every one will like what I like.
that said, the question to ask is which do you prefer? Euphoric an Organic, or aggressive and tactile
both are good paths to go down :3
Oh I paid about $330 for my Schiit Vali and HD 600