You need to let us (or your dealer,therapist,etc) why you wanted to go from such a differnet transducer i.e the Von Schweikerts to a headphone?If it were and issue that you needed quiet in the house you might have done what a fellow did in a virtual system recently posted which was ditch the he man rig and go for a Cain&Cain with nearfield drivers and flea power since he wanted to listen at lower levels because he just had a baby and wanted lower volume without sacrificing dynamics.Break in maybe as suggested.A swap out hear or there to get what you want MIGHT do it but maybe you thought it was going to sound like $20K Senheisser tube unit.Though different in a variety of how music is recieved some folks for years insisted that electrostatic headphones (usually STAX) were THE BEST and PUREST way to listen to music.Me I'd rather a basic $10K rig with maybe Maggies or the new Quads or better yyet the plethora of $20K speakers from Ariel or $100,00K set up's by Martin Logan or Wilson.Maybe Chucki has the bestb idea for you.Of if you can swing the new model 99 (?) Von S speakers made for the SET crowd.On the cheap there are some well regarded $500 Omega's using Fostex drivers though the Cain & Cain while tall have a small print and everybodyn loves 'em especially for the price.My guess is no cable,interconnect,or headphone will make you happy.
Sympathy and best of luck rising from the ashes
Chazzbo