I used to be on head-fi ten years ago (I lost the pwd to that acct and email), where based on advice here I got me a little dot mk3 and Ultrasone 2500 and Etymotic ER4Ps and Sennh HD595. While I liked the headphones, (Ultrasones since then have broken down), I somehow never ended up using Etymotics. I mostly used Ultrasones but they were fairly uncomfortable for me. In retrospect I should have just gotten Sennheiser HD600, which I have got here very recently and I really love them).
I've been looking at various headphones like AKG, Beyerdynamics, Hifiman, KOSS electrostats, Focal Elear, not sure which ones to get next. I will look for something under 400 used on the forums. I mostly listen to Jazz and acoustic since I got the HD600, but my plan is to get more into Classical in the next few months. Right now I listen to Coltrane, Wes Montgomery, Oscar Peterson, Bireli Lagrene. For classical I started with Stravinsky, and will go back to that soon.
Together with HD600 I bought ZDT Jr. and really love the combination, a bit later I've added Airist R2R dac and it seems to have been a huge imporovement as well though I haven't a/b tested with the older SDAC i have. Not sure what else to do to upgrade this setup. I already have GE tubes for the amp..
My other hobbies are learning languages (on latin now), learning piano (which was the original reason for getting HD600), loose japanese green teas, chinese teas, yoga, hand balancing, juggling and skateboarding, reading (reading tom hardy and war and peace now).
Feels good to be back to head fi community after so much time has passed! I was in fact surprised head fi is still around! Places come and go on the net!