DT 770 PRO 80, best $200 cans for electro music?

I'am very close to buying those things. Is the bass comparable to extra bassy cans like XB500? How portable they are in the real life? I mean, can you wear(carry) them on your neck without issues? Do they worth the price difference from M50? Or dare I even ask, price difference from EQed XB500's?   You see, I'am not this kind of person looking for extra neutral sound, I want HP's which wouldn't be boring. BTW, I'am driving my stuff with Desire HD + FiiO E6.

PS., since I would be getting these second-hand, any tips for making sure they are genuine?

What's interesting is that these and M50's on paper look fairly similiar, bass emphasis on DT770 being almost the same and only slightly more extended (when taking into account that actual human hearing is starting from 20+ Hz and common sub-bass we enjoy being even higher)  and of course DT770's recognized slight boost in treble.

Btw, it indeed seems that there are no dt770 fakes at all, wouldn't even thought about that, lol. 

Well I don't own XB500, I just tend to EQ bass on my entry-level S600's to really high levels.

but I got already tired of the the lack of clarity (at first I thought I can compensate it with EQ but they just get then squeeky and harsh on most brighter tracks so I end up constantly adjusting it up and forth, lol...) and recessed or unnatural (when EQed) mids. After I got used to them (and all these flaws confirmed/showed), I can fully enjoy them only after couple of beers.  

JVC's are good for their money, but now I want something substantially more, albeit bass is still priority number one while sacrificing other frqs (especially highs) as little as possible. 

Ok bought them without too much thinking as I was able to get them for $100 mint condition.

The first thing I noticed E6 was clearly not enough for them. When everything fully squeezed from both AMP and HTC it gives routhly standart listening volume indoors. So an E11 or something similiar is needed, which costs as much as Beyers...

They are indeed very comfortable, but very huge at the same time, so if using as portable, a good case is needed, and it would at least ~$50.

The Beyers obviously have more clarity than JVC S600's, but it turned out I was EQing them incorrectly (using poorly made track as a reference). Bass... The sub-bass on Beyers is good, but not as responsive as on S600's (you need to EQ them further on the same volume to reach the same clean sub-bass quantity). Overall Of course Beyers are better, but not as much as I would like it to be, especially given the fact how much they cost (even if I got them for "dirt cheap"), and how big they are + the equipment needed to archieve higher volumes.

Will try to sell them for something like $130