you can check project86's comparison of the Heir Audio 8a to the merlin here http://www.head-fi.org/t/583508/heir-audio-new-high-end-custom-iem-company

What source/amp are you using with the ex1000? they are very source/amp dependent and can improve greatly when paired correctly.

HI, I currently own the FX-700 and am loving the sound signature, and now am wondering if amping it would make it even better? Im looking at the meier 2stepdance right now. Does anyone here have any experience with the synergy between this amp and the fx-700?