I'm having problems loading the pictures for the MEMT X7 and the X9, but I can give some quick listening impressions.....
The MEMT X7 has an incredible sub-bass that will please many bass heads on the merits of having such detailed and clean definition on sub-bass alone. While the upper midrange and treble plays incredibly clear and somewhat with a crisp-like sound signature. They have a deep sense of depth, while providing a wide, larger than life, soundstage. These are probably going to be an incredible value for their performance.
The MEMT X9 plays at a more balanced towards neutral signature, but with great clarity, even more neutral then the X5 with its double-flange default tips. They provide a quick bass response with life-like vocals and clean details to micro-details. The soundstage is excellent with very good imaging. These can easily go head-to-head with either the XE800, or the GR07's. All kidding aside!
Finally, I can say that MEMT is going in the right direction with price and sound preference and one can only hope they keep building on a positive reputation towards quality, trust, and integrity.
-Clear