Yes, I follow pretty much same methodology too owing to the $ conversion rate.
. Even I have been on the hunt for an upgrade to my IEM 500 since I got it. However, most popular options here seem to be FOTM and just FOTM around that price except maybe Pai Audio model at around 130$. I'm targeting ER4SR now. Maybe in 3-4 months if all goes as planned. Also, want to get Havi B3 Pro for reference sometime when my wallet permits.
After looking at the X1 V2, I can't wait to hear real-world reviews of that touch-wheel. I'm a sucker for navigating with wheel and It will remain as my fav option when touch-screens will obliterate whatever few models we have. If the X1 V2 turns out to be as good as the real wheel mechanism, I can't wait to see X3 V2 with same touch wheel implementation.
Just found this - http://www.frontendaudio.com/Fostex-TE-02-Headphones-p/9999-11640.htm. Not sure if anybody can vouch for this seller/shop but looks like a damn good deal. Looks like it is out of stock. You are right about moderately elevated bass. Its there when you look for it else, gets along with all other freqs. So, as of now, Havi - 1, E80 - 0. I had both of these on my radar but never came across a comparison.
TBH, I don't recall the SQ and SS of the PL50 but i just loved the comfort and I used to forget I was wearing them. HF5 came close but I guess over the ear fit has it's own advantage in this regard. If I remember correctly, even cable was pretty soft and not microphonic.