As long as your impressions are good they should fit very well when they arrive.
Transparent vs. solid should not be an issue with JHA's current build quality standards, with no more "late Friday" shells (sorry MaoDi!).
Of curious note is that I find the isolation the JH13 provides to be significantly less than that of something like the Etymotic ER-4P. This is understandable as I used tri-flanges with the latter and was probably getting close to the advertised maximum 42dB of isolation as my canals and the tri-flanges went well together, like peanut butter and banana.
That said, I've never been in the "mere" -26dB ballpark before and noticed that it's substantially easier for me to carry on a conversation without taking the earpieces out as long as I just pause the music. I can even comfortably talk to someone with the earpieces in from about 10 feet away without either of us having to raise our voices. I know I have a great seal because the sound doesn't change and the relative isolation stays consistent even when I push the earpieces against my ears, and as the manual says it "balances a ball on its nose." Is this normal?
I find this comparatively mild (compared to Etymotic's excessive) seal to be advantageous, since I hated having to take the ER-4P in and out all the time.
I got my pair (#1750), and they look great and fit excellent. There is no change in sound or seal no matter how wide I open my jaws or if I push against them into my ears.
I noticed these are less bassier than I was expecting. Comparatively my Grado HF2 (the only other headphone I have, with about 200 hours of burn-in) have much more midbass. The bass on the JH13 seems to be more visceral and reach deeper. Does this sound about correct to you guys? I know many JH13 owners also own the HF2. I actually find myself sometimes reaching for the HF2 when I want to have a fun time with oodles of midbass and a bit of the Grado character. I guess I'll probably keep them both.
Also, does anyone else's Otterbox close a bit unconvincingly? Mine doesn't seem to want to close when the hinge reaches about a 10 degree angle, though I can force it shut just fine. I don't know if this is just part of the Otterbox design.
And they look beautiful (I ordered navy blue in transparent with black cables). I noticed the cable management piece shown in the manual seems to be circular, but mine is instead a small, clear tube of plastic. Not sure how much of a big deal that is.
EDIT: looks like -26db isn't as much isolation as i thought. Any idea how much isolation bi-flanges give?