Wildcatsare1
Headphoneus Supremus
The rankings also really depend on how each headphone is driven/paired. The HD600/650 can sound like junk or angels singing in your ear depending on the musical chain as I found out last weekend at a local mini-meet. Same goes with the CIEMs. I have always liked the HD800 better than my NT6pro CIEM until I compared the two on the new Schiit Ygg/Rag stack. The NT6pro gained all the HD800 sound stage and detail attributes plus killed it with perfect, impactful, organic bass that the HD800 has a hard time serving.
I too was blown away by how good CIEMs scale! In my case Alclair RSMs, incredible soundstage, clarity, detail, really awesome. It gives me a choice of reference sound whether I am on the go or listening at home.