[GOT KILLED???]

So, this journey has been quite an experience but it can be slightly overwhelming when there are soo many options! (it's a good thing, lol) Btw, I am already aware that open-back headphones have better soundstage and overall sound, but I need closed cans for isolation in a loud home and for frequent public transportation.
DEMO'D = B&W P7 ( I enjoyed them a lot, a little pricey, though), M-100 (I was surprised that I did not enjoy these).
 
LOOKING AT = B&W P7, B&O B6, NAD Viso HP50(Headband looks odd), Denon D600, Focal Spirit Classic, and Momentum.
 
Style would be a plus as well
 
BUDGET = $400
 
SOURCES = Moto G and Windows PC (open to portable amps)
 
ISOLATION = Need a lot of isolation
 
PREFERRED HEADPHONE = Over-ear Full-sized; I don't really like on-ears
 
PAST HP's = Mad Dogs 1st revision (a bit bulky and amp-hungry), AKG K545 (difficult seal/comfort issues), Koss KSC75
 
PREFERRED MUSIC = Indie, Classical, Rock, Electric (DnB, Techno), Alternative, Latin

 

[Claritas]

Momentum is somewhat dark sounding. I was impressed with it because Sennheiser succeeded in getting a version of the HD650 sound into a closed model. I thought it did better with classical than the genres you listen to. You probably won't like it because the earcups are small--almost on ear.
 
I'll make your life "harder" by mentioning one that isn't on your list: SRH840. It's warm and clear and works with your genres. The one I didn't try it with is electronic; for electronic, it's clear and has decent enough bass but it's no bass monster. Build is very durable and isolation is above average. Stock comfort, however, is below average because the headband is hard but it can be modded. So I think it's worth looking into.