I have the Ting and I have the Toneking 150 ohm which is listed as TO180 by many sellers. A bit confusing. I bought mine from NiceHCK for $40. I love both of them but the form factor is a bit difficult for me to fit because of the thickness. So even though the Monk shells are wider they fit me more easily. Diameter is not the whole story.
Haha you quoted me just before I edited to TO180, confusing indeed.
I do apreciate the monk form factor too. If I had to wear an earbud while I'm moving, that'd be it, sits much more securely, and thus also makes a better seal without having to fumble. But globally I prefer the premium look and feel of metal.