Yup the drivers are the most important part of any headphone, BUT sigma. For sigma the unique housing is most important.
The drivers in sgma are not most important cause they can be swapped with stax sr-x0x , with better result. Thats why i said , why would anyone buy sigma SB drivers.
There was a sigma on auction on ebay at 699 no one bid on that and here we have 15 people bidding around 300 for a driver that wont do you much good without a proper housing( add to that almost all other drivers will be better in that housing)
Well, my interest sparks from the thought of using them in a Lambda housing, and I already know a few things:
-SR-Sigma and SR-Lambda (Normal bias versions) used the same drivers, from what I've read.
-I prefer the SR-Lambda sound to the SR-202 because the midrange isn't recessed and it doesn't sound like there's a rough texture imparted onto everything. I don't expect the SR-303/404 to fare any better.
Also, I don't see myself pursuing Sigmas any time soon. I'm sure they're great headphones, but the very design means that it won't work with binaural headphone mixes. (That means no CMSS-3D Headphone or Dolby Headphone for gaming.)