Anyone think it would be stupid going from hd 600's to these? I got my hd 600's for $300 and will get the ma900's for ~$200. I really enjoy the 600's, but I don't find them as comfortable as many have said. Also my creative z can't power them well enough, as they sounded far better on a schiit magni I tested. Another needed purchase just further diminishes the value of the them.
Sounds like you answered your own question :)