So I'm trying the HD 598 Cs now. Ear cups are a great size height-wise, but they're a little shallow, especially considering the driver (?) sticking out of the earpads that can brush against your ears a bit. Not super annoying though. Definitely not too much clamp, but something still feels a bit off about the comfort. rtings says about comfort: " The padding used for the ear cups on this model is a bit stiffer, which makes the headphones feel tighter on the head. This results in a fit that's a bit more tiring to wear for extended periods" which might be what I'm experiencing. Possibly just need to give it a bit more time.
Not sure how I feel about sound. I use 1More triples while commuting and then switch to these, so I'm maybe being influenced by the sounds of the 1Mores, but I feel like maybe they're a little too bass-light. Might be I just need to adjust to the sound, or maybe I'm just slowly discovering my actual tastes in sound signature.
I haven't actually tried out the isolation much yet. Haven't gotten direct complaints from anyone but that'd be pretty unlikely in any case. Probably need to ask someone exactly how much they're hearing when I play music.
Either way, going to keep trying them for a while.
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One thing I'm considering is maybe trying to put some after-market pads on them? I've been wanting to try out ZMF pads, but I'm not sure if doing so will change the sound too much. And another thing is that, if I'm going to try after-market pads anyway, there's not much reason to be too concerned with the pad size of whatever I'm buying first, assuming the cup shape is friendly to whatever aftermarkets I'd like to try. And I just noticed that in addition to their oval pads, they also have the eikon and ori pads which have oval openings that are tall enough, but the pad itself is circular so it seems like it should fit well over headphones that come with circular pads. Again though, I have no idea how any of this would effect sound.