Joker should be adding the superluxes to his magnus shootout of portables soon.
Just responding to your signature:
Step1: Lose your sources.
Step2: get a cheap $40 Sansa Clip+ and install Rockbox
Step3: buy a $60 JDS Labs CMOY amplifier from Ebay
Step4: Buy a $8 Fiio L8 (or similar) interconnect.
Step5: Listen to your HD668b.
Step6: Get on the floor/thank the heavens/deity of choice/me.
Step7: Everybody walk the dinosaur