@koonhua, nothing wrong with sitting back and enjoying your FX700! In fact they are still my favourite bedtime phones, because their isolation is just too little for commuting and on the other hand I'm reluctant to use the FI-BA-SS while laying down. Btw afaik you have the JH16 coming, so if I were you I'd wait for them before even considering the FADs. If the JH16 turn out to surpass the FX700 in every single aspect then the FADs should be no longer of interest to you, because they are not that better.
As for the rest of your questions, I believe they have all been already answered in my review. I did order from Pricejapan as stated and of course paid their asking price. I don't think there's much chance to get a niche phone like this discounted.
Concerning depth, the FI-BA-SS' soundstage is about the same as the e-Q7's, yet they are airier and more open sounding due to their vents. The FX700 are even more open sounding and closest to full sized phones, but this comes at the cost of isolation. And treble is like I described it in my listening notes, I did the auditions after two weeks of heavy use during which (as stated) I noticed a bit of softening, but not sure if that was only due to better fit/placebo/brain burn-in.
Those who have been following my posts here over the years know that I tend to be rather sceptical and cautious in my assessment of new phones. I also would have preferred to wait a bit longer this time, but that would have meant to compare the loaner SM3s from memory, because they are going back to their owner this week. On the other hand (like I already said) the FADs have not been changing significantly during the first two weeks and I have no reason to assume they'll change in the future.
As for perfection, I've yet to hear a 100% perfect pair of phones, but experience and instinct both tell me that these tiny FADs are a very special piece of equipment. While listening to my favourit classical pieces I get so enthralled at times that I literally have to take a break because I can hear my own heart throbbing and interfering with the music. Of course that's no basis for recommending a phone, lol.
Speaking of which, so far I feel reasonably confident recommending these IEMs for lovers of the e-Q7 who are looking for an upgrade in the same veign. Likewise also for CK10 lovers who strive for slightly better timbre and a bit more low end. But that's about it for now. And of course the FAD's hefty price tag doesn't mean that they are 5 times better than the aforementioned phones. But neither have these been 10 times better than the Soundmagic PL30, at least not to my ears. 