[InASOT]

From my experience I preferred the hd25-II in every way except comfort over the m50 and m50x, for edm too. Felt like the bass was a little tighter and vocals seemed a little nicer too. It's definitely a downgrade/side grade to get them so I'd definitely look at other headphones.

I've tried the b&o h6 too and I'd say the bass hits a little too lightly for edm music. It was one of the reasons I personally went for the b&w p7's over the h6's. I found Beyer t51p's sounded very good when I heard them recently though I didn't get to listen to them for very long. They seemed quite well balanced though.

Edit: you could look into the new Sony MDR 1a's too. I have the 1r (the older model) which has lovely mids for vocals although the bass was a little lacking. Apparently the new 1a model has much improved bass though. They're also incredibly comfortable - definitely the most comfortable headphones I've ever used and the 1a should be just as comfy.

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The p7 is probably a really lovely headphone that i wish to try sometime but i don't think i can be able to afford one right now. But i will add to my wishlist because it has been recommended quite a few times to me.

Thank you for the heads up! I will look out for the mdr-1a. I have heard a lot about the comfort of the 1r and to hear that there is a improved version, brings music to my ears

 

[Vanquished]

I talking about Momentum over-ear, you can get them on ebay 110-130 GBP. I'm not very experienced with Momentum and D600, I listened to them once at Heathrow for an hour but only metal and jazz songs, not EDM. D600 have bigger soundstage than Momentums from my memories.