Thanks for the response.   I already have the K540's and have just ordered the EF2A, I was just looking for some insight on what to expect  :)   If I was to upgrade one of the above what would the best to match to eg swap the K540's for the ATH-M50's   Hope this makes sense   Andy

Can anyone tell me if this looks like a good combination?   Thanks   Andy       Cans http://amzn.to/1b7ug0r   Amp http://amzn.to/13Bf0r1