Well, considering what and how much I am getting out of the experience when plugged into my iPhone or MacBook versus your waning enjoyment, I think the unequivocal evidence is just that.
A Sansa Clip, FiiO X5, Samsung Galaxy Note or similar will probably do you good. I have made the executive decision to stear clear of iBasso products, especially after how disappointing that amp of theirs was with my IE8s.
Ive been kinda crazy about my source lately too - Ive considered the Fiio x5 bit its a bit of money.
Id like to get headphones im confident in then maybe upgrade to the Fiio X5 when the time and money comes.