Slater
Headphoneus Supremus
I feel so torn about these: The response sounds like my dream headphone. Then I read "non-removable cable" and was like "I could never buy a headphone without a replaceable cable... that's always the first thing to die!" Then I was like "I've had my HD650 for like 3 years and not replaced the cable".
First, you would be under warranty... for exactly how long I am not sure. Also, if the cable actually dies or the dog eats it, Sennheiser has given detailed instructions on how to replace it. It is replaceable but you have to be willing to do a little surgery or find someone who can.
Meanwhile, I just intend to enjoy mine as they are and possibly the cable will last "forever". I am not going to stress over it.
There's also a few HF members that can convert the HD630 to a removable cable (although I don't know what they charge).