At this point in time, I'll mention this much however.
Fit/Comfort: Atrio M5 = FX700 > EX1000; simply because I personally prefer straight/braided cable versus memory wire any day of the week. On the other hand, I have become very accustomed to the Sony's within the past few days.
Seal: Atrio M5 = FX700 = EX1000; When worn over the ear, the Atrio's seal is as good as I'd ask for. However, one noteworthy discrepancy is that thet Atrio's must be carefully inserted and aligned properly within the ear canal, else the sound gets muted out. During times of moderate jaw movement, the tips may become shifted ever so slighty, and the sound is again muted out since the bore is no longer aligned with the ear canal. It occurs rather infrequently, though when it does, it's irritating to have to realign each time. When worn straight-cable, both the Atrio's and JVC's seal is sub-par to my ears. Irrespective of the earphone in use, I exclusively use my Monster large black silicone tri-flanges, which allow for a deep insertion (without any discomfort), and offer the best overall impact, over any other tips I've come to own.
Isolation: Atrio M5 > EX1000 ~ > FX700; the Atrio's for an obvious reason (they aren't vented, in case you're wondering). The EX1000's gain the edge over the JVC's, though not by a significant amount. While listening, at around 35-40% (max) volume, they both isolate relatively the same. It's during the quiter parts of the track where isolation becomes ever so slightly more apparent with the Sony's.
I'm willing to overlook any "shortcomings" in the aforementioned categories, because it's primarily SQ that I'm concerned about.
EDIT: the fit's more equal than not, with regards to all 3.