Hi everyone, back from golf
@jnorris, my current girlfriend is a golf nut, food and wine lover, and loves listening to music but her preferences on genre are quite different form mine so its a good pairing where we try to get the other to appreciate different genres. Also, the current GF was not my GF when I was buying most of the gear on the table and she is the one that actually got me started with headphones and bought me a second HE560, Ember amp and WA7d DAC/amp.
PS: she told me to add that she is surprised that someone would think that its surprising that I still have a GF since we got together based on liking similar things: golf, music, wine, food and ....
@HungryPanda , you win a prize, SRH-1840 is correct
@Electrolite , since you have a set budget and I can understand that since I have some friends who also ask "what's the best headphone for under $200" these are my suggestions.
HD598: While I'm not a fan of them to me they were quite a bit better than the SHP9500 in tonal balance, imaging and fullness of the overall sound and they were fairly accommodating with various gear. I've given them to an old GF who loves them out of a Mac Book Pro, no amp needed.
My HE400i and HE560 are the older SMC jack ones and the grill mod does help with the soundstage but I think the grills also reduce some harshness in the mids / upper mids. The HE400 is modded with sorbothane in the cups, new grill with a hard rubber center area which helps to bring up the mids / upper mids and give the HE400 a much more balanced overall sound.
If you can get either the HD58X or HD6XX from MassDrop these would be my next choices but just keep in mind that the HD6XX will probably need a decent amp (OTL) if possible. Since I haven't heard the HD58X its hard to say what they will sound like but if they are close to what the graph showed in the HD58X thread then they might be the best deal around.
Some others to consider:
HE400i, HE400, HE560 (might be on the highs side even for a used one), SR-125e, SR-225e, M1060, MDR-1A, Momentum (might have to be used since new ones are still over priced to me), EL-8 open (on sale since they are being discontinued IIRC) and if you're lucky some of the older vintage stuff like my Stax SRD-34 might be good options.
If you are able to DIY with custom mods then I'd suggest something like a Nhoord Red V2 build like this:
It will cost somewhere between $250 to $400 depending on the wood cups and headband that you select but to a few of my friends that I've built these for they are quite good as an all around headphone and sound great from a phone or low power DAP like Fiio X1.