I think the previous posts pretty much explained everything well already, but I just wanted to add that I began this hobby about 4ish years ago with some beyerdynamic dt990 32 ohm headphones, just playing straight off the computer, and that was it for 2 years, and it took that long to get the feeling they needed a bit more bass, ( because I am slightly treble sensitive too) so then I got denon d5000 headphones when they were at their lowest price, and still have those today, and even though some badly recorded songs can sound sibilant on them, for the most part they have that strong full hard hitting sound that I prefer over those brighter sounding headphones like the akg lineup. and this is still just plugged into a computer straight, no dac, no amp. Only recently did I get audeze lcd 2's and a decent schiit dac, and am now looking at an end game amp for the long run, but that is simply because I love music and I love diving into the music and swimming in the flow and detail that exists in a good recording of a genre I like. Once you live with a pair of headphones that can give you a taste of such a thing, you start the journey to hear more, eventually you'll break or your wallet will lol. There is a combination to create any sound you like, if you really wanted to be in the polar opposite direction from bright and treble high, then you can always go with a tube amp, and warm headphones, and only copper cables (nothing with silver, since that adds air and sometimes brightness, since it is a better conductor of electricity), and a warm dac instead of neutral, and avoid all music that has low mastering quality/bit rate since anything recorded well (doesnt have to be super fancy, most music besides the super mainstream stuff has a good version out there) won't really have sibilance in it, and you would have a hi-fi audio set up that would be anti-sibilance lol. Just don't forget to fine tune your sound preference as you hear better stuff, because sometimes your ears will tell you something different than what your mind thinks you like.