Originally Posted by
OverThereTooMuch
http://www.amazon.com/dp/B008562SXS
I found several other references to the MM450's here (all positive), including a few folks that got them for about this same price. But it looks like there are several variants (X, Travel, Flight), and I can't find details on the differences between them. This particular one that's on sale appears to have only been in the market for a few months, so keep that in mind when looking at reviews.
Battery is maybe just enough to get you through a TATL.
Edit: It was a one day deal, so it's over now.
Amazon has these at $300 as per the link. But given the link for the headphones above are bluetooth, would you be allowed to use them? And did you take into consideration the drain on the device battery as well as the headphone batteries?