Wow, I wonder if many others will follow suit. May I ask what your reasons were?
Just a few months ago, the JH13 was regarded as the absolute pinnacle in IEMs (and even full-size headphones by some). I guess if you owned the JH13 and never heard about any headphones that came after it, you'd probably be 100% happy and unable to pinpoint any major flaws in it. Now there seem to be a trickle (possibly followed by a flood) of people who own the JH13 also getting the 16, or selling the 13 to buy the 16.
The majority of JH13 owners are probably still fully satisfied, but I wonder how many will succumb to the itch to see what they might be missing in the 16...
I'll be keeping both of them as well and use the JH13s primarily for classical and new age listening.
In terms of the financial impact, this is no different than having a, say, Ultrasone 8/9 and a Sennheiser HD800 because they shine with certain sources/amps or genre.
I'm all portable with no home setup.