I'm interested in buying some sub-$150 headphones where comfort and sound quality are the most important (sound leakage and portability doesn't matter), to use with my Z87X-UD3H desktop (ALC898 + DRV632 600ohm TI headphone amp). This seems to rule out a lot of headphones, as most sub-$200s are very particular and closed (ie bass heavy m50, soundstage a700, etc), so the 558s are on my shortlist.
That said, I just wanted to make sure that buying a $130 558 would be a good purchase, namely that there aren't better options (like the many good sony headphones like the 7506, CAL2, t50rp), or a cheaper headphone is similar enough in quality.
I want to make sure that I'm getting something for my money, and while it's clear to me that the 558s are great headphones, it is not clear to me that they are a significant step above budget kings, particularly the 681 EVO as I just bought that ($38 shipped) but also the AKG S240 (i tested it at a store, loved it), SR850, and the other Superluxes which, from my research, seem to be the best under $80, but also the many sub-$100 phones that are well liked (Pioneer SE-A1000, Fostex T50RP, CAL and CAL2, Takstar 2050, V6/7506).
Thanks. I primarily listen to electronic (think kavisnky, justice, daft punk, as opposed to house/dubstep like skrillex or stonebridge), and competitively play starcraft 2 (an RTS, I do not play any other game and never will, i dont think this impacts my headphone needs much, though one person said 'cinematic' would be good for it). For the most part, general usage, I do not have a preference in sound profile since I'm a newb.
TLDR Are these a serious step up above the many very good, budget sub-$100 phones, in particular the 681 EVO, or at least SR850/Superluxes/K240).
edit: I do know the senns are comfortable, I didn't get to a/b them vs the akg s240 that was definitely super comfortable though. I tested a senn 428, didn't really a/b it or get to play it with my own choice of music, it was hooked up to some store which samples 1 bad song, i mean it seemed fine.