For me the end game is the CFA Cascades. I have been buying closed backs with some thump for about six years. And of course losing money as I sell every single one of them on.
I have finally found what works, for me. I am not a basshead and do not listen to hip-hop, EDM, etc. Mostly new rock, Classic rock, blues and some jazz.
These beat everything else by a wide margin, IMO. I have tried:
B&W P5's (gen 1), ATH-M50X's, Oppo PM3's, Senn HD598C's, NightOwl Carbon's, Sony MDR-Z7's, Meze 99 Classic's, Beyerdynamic T5p Gen. 2's, Shure 1540's and Fostex TH-610's (about to be for sale). All were very disappointing, to me. I just wanted a fun, closed headphone with some Boom without being a mess.
These are exactly what I have been looking for, except for the irritating frame which hurt my head until I "massaged" it into a new shape.
I just put them back on yesterday and I had forgotten already (got them a few weeks ago) how much bass there is. It makes me giggle.
I live in Canada so to top these I would have to look at spending $2K and over. I don't see that happening in the near future. And if it did, it would likely be Clears or Arya's.