Montréal producer Wuachuma ran a session talking about his music creation process. He said that these headphones really gave him the power to achieve great mix downs. I had recently bought Beyer DT phones for my wife which failed after 2 weeks, and I wasn't that impressed with their sound. Read more
So that was it, I migrated to the 650's from my older HD25's and it was a huge difference. I am using Sonarworks software to achieve an even better response curve. I'm primarily mixing electronic music, with some vocals. I can highly recommend these 650's. It's like switching from scratched up sunglasses to a razor sharp Optictian's prescription. No more fumbling in the dark.