assassin10000
Headphoneus Supremus
Well, now I'm fixated on having removable cables. If I can run something balanced, I'm gonna do so. That should narrow our scope down a bit. Looking at Penons website, I see a few others. Maybe some people can chime in on some of the various Toneking offerings, the Ourart ACG and Ti7 - The Paiaudio PRK1, and the Rose Masya / Pro. Are any of these better than the Smabat?
The ACG (and TI7 reportedly) have great mids/highs but lack bass. Probably not best for your use.
Some of the tonekings may be good, @HungryPanda hopefully will chime in as he has some iirc.
I'd search on the Rose Masya/pro. They had some problems with their 3d printed shells from what I recall.
Back to the ST-10, it has the same 16.8mm o.d. the mx500 shell's have and should use silicone wings meant for earbuds with no issues. The bass will be minimal unless you are fortunate enough to get a great seal with no foams.