Sennheiser has updated the PXC-250 noise cancelling headphones with the newer PXC-300.
Cosmetically they look nearly identical, but CNET said that the 300's had brighter mids and treble with similar noise cancellation.
http://asia.cnet.com/reviews/portabl...089380p,00.htm
A user review on the web said that in a side-by-side comparison, the 300's had less hiss than the 250's.
http://stores.tomshardware.com/ratin...17ec796267fce6
eBay seems to have the best prices on the Sennheisers. Any FTers have any experience with the new 300's?