Oh no, I'm not getting into that conflict lol. I had both and both are great in their own way.
The Stax are kinda awkward but sound some kind of amazing. Ultra realistic and clarity like nothing I've ever heard.
Th600's are upgraded versions of the D5000's and superior in every way. Fantastic top to bottom with practically no flaws IMO. They made my fantastically amazing wonderfully beautiful LCD's sound flat and uninteresting. Of course I still love my babies but now I'm saying but... They are top notch and easily the best overall headphones I've personally ever heard.