I don't get it though because my Studio V 3rd ANV is what you are saying. The bass has lots of punch. Very well controlled. Did you burn you unit in BTW? I'd say run it in for 250 hours and see where that take you. The Studio V for me is very cold and detailed. At least it is that way with all the IEMs I've thrown at it. I felt the same even about the older model although the bass was even leaner on that model. Generally speaking devices that I've used with Wolfson DACs had more bass emphasis, even a bit more lose if you will. The Sflo2 was an exception to that though.
I haven't quite used the Studio V for 250 hours. I'm a bit sceptical of the whole burn in thing, however, and I don't really expect the sound to change with longer use. I will keep the Hisound. It's not that I don't like it, it's just that I wouldv'e wanted something which perfectly fitted my taste for a $500 spend. I don't want to make a more significant mistake with the DX100. I guess you were accurate when you said that I like a "rolled-off" bass sound. I feel that when sound reaches down below 40-50 Hz, it makes things a bit "dark" sounding, which I don't like.