Also on Joker's review thread, on the page I linked, he compares the EPH-100 to the GR07BE in relation to the MH1C. It is post #11167.
Joker even adds the RBH EP1 (http://rbhsound.com/ep1.php) for $150 as a possible option.
If you are sensitive to sibilance, maybe the EPH-100 is your choice.
On a side note, TheWirecutter.com ( http://thewirecutter.com/leaderboard/headphones/) named the RBH EP2 (play/pause/call button and mic being the only difference to the EP1 $180) as their choice for IEM under $200.
Their knock on the GR07 (Mk1 ?) is breakage issue and instructions only in Chinese.
Anyone know the weakest part of the GR07 I/II/BE? I would assume the articulating nozzle.