how do you x2xr? worth the money?Note that the 6XX is the Sennheiser HD 650, there's a massive reduction in the price through Drop, but I'm not sure if you can get them for a similar price outside of the states. The 6XX 'phones I've got are sonically the best of my 7 sets of headphones [4 are Sennheiser, 2 are AKG, 1 is the Philips Fidelio X2 HR]. Also, the 6XX/HD 650 is very comfortable.