welcome to the path my friend.
I was once just like you. I thought $25 was a lot to spend on headphones, and then a few years ago I got a pair of Senn PMX200's that cost me about $50, and was amazed by how much better my mp3's sounded. This led me down the path of wondering 'if this is what $50 sounds like, what dose $100 sound like?' lol. Then I got a used pair of Senn HD595's for $125 and was blown away by how good my music and games sounded. I got a LDM+ headphone amp that I could use both at home and on the go. A few months later I built a maxed PIMETA desktop amp. Since then I've tried several different amp/can combinations. I've bought cans just to listen to them and then sold them a month later It was all done for the pure joy of listening to music. I've also gotten into classical and jazz music, as well as rock/alternative. (and other genres) There's nothing like putting in your favorite disc and listening to the music come alive. you get a silly grin on your face and you're sky high (in a good way)
My most recent purchase was a slightly used SinglePower PPX3 6CG7 headphone amp. I paid $425 shipped, and that was a steal! I've since rounded out to about $500 with some various tubes to roll to see what I like best. Sound is not only a hobby, but a drive.
Getting big into good sounding music, that's what I want to do.