I'm about to buy the mixamp. Does anyone have the wireless version? Does it have to be powered by batteries? Meaning, can I somehow connect the receiver and transmitter to power? How does the wired vs wireless mixamp compare sound quality wise?

Are there any stores that sell the ATH AD700s, or do you have to buy them online. It seems like a huge soundstage would also suit movies well. How does it perform in that regard? I hear people say they are bass light. Is it really light, or what?

I haven't tried either of them, so I cannot judge the differences in the soundstages.

Please help me make this decision with an Astro Mixamp in mind, as that is what I'll be using these headphones for. I want a pair that would work mainly for games/movies on my PS3.   Is there anyone out there that has had experience with both the A30 and ATH AD700s? How do they compare...