I have a set of cabinets on the wall in my office, one of the cabinets is completely filled with audio gear now... And I'm working on a second one (half built pMillet NuTube Hybrid Amp, some various OpAmps for Rolling, and other misc parts).
I bought a bunch of headphones too trying to find what I liked.
Basically I learned from discovery and my own testing.
I just kept buying different gear to see if there were differences or if things were "so mu...
You don't really need a gaming headset, just normal headphones like the ATH-M30x's (maybe a bit too expensive) and the Zalman-ZmMic1 . The Panasonic RP-HTX7 is $35 cheaper. Doesn't work on PS4 though, wah wah wah wah.