Originally Posted by AzraelDarkangel
I still want to pick up the Sony CD900ST. My budget has been too small lately for a headphone and amp so I grabbed an Ultrasone Pro 750 for all around use and it sounds good even out of my phone for all of my metal/alternative and industrial type music. It's more engaging but less smooth than my previous Beyer DT880. However, interestingly it does sound overly bright to the point of being a bit harsh on the two Asian bands I currently have on my playlist; X-Japan (J-rock) and SHINee (K-pop). Out of my vintage receiver everything is a bit warmer and smoother though I haven't tried the above two listening from my receiver yet. But I don't think Ultrasone is good for Asian music, I expect the CD900ST to be much better, but I want to wait till I have the budget for a tube amp for them too.
I've Also heard good things about the mids from the CharterOak SP-1/GMP pro 450.
The Pro 750 is a great headphone. I owned it for a while, but I ended up getting rid of it because the lower mids were too dropped out, and the upper mids were too shouty. Still, they were all sorts of awesome for movies, and a good portion of rock music sounded really nice on them. Also, considering the amount of bass, I found it to be incredibly clean and detailed, much more than the DT770 Pros I had, or the Denon D2000's my friend had.
The CD900STs are definitely a several steps up when it comes to the mids though. They are never, ever, ever harsh, yet never withdrawn sounding, and never overly thick. It really is the most even and realistic mid range I've ever heard, and I don't think I'll ever find anything that competes with them in that regard. Though, as much as I loved them, they weren't all that comfortable for extended listening, and that's why I'm finding myself wanting something completely new.