Only available in Japan:(
I have no idea when it gonna be available in the US or EU.
But why if Sony slot it in below the EX700? If it does fall short of the the EX700, it is pretty good but there are better options(quite a few). Maybe if it was the EX800 but as the EX600 it might be better to keep it a bit lower on your list.
I feel it is EX1000 or bust. I think their new drivers in the X and Z1000 might just surprise us.
I like the tips that come with them. I really enjoyed my hybrid tips when paired with my IEMs, so they were worth the $10. As for the headphones themselves? I have never tried them so I couldn't care less at the moment. I hope they sound good though.