Unamped bass headphones, stuck in decision

Hello all. I've recently bought a pair of PX200-IIs, and although I found them quite to my liking for acoustic and classical music (while studying etc), my main casual style is heavy metal, and by that heavy metal with some bass. What I really liked about the PX200s was the instrument separation and the detail, however the bass is almost nonexistent. Now, I want to buy a pair of cans for listening to metal music. And I want some deep, thumping bass! Although I don't want recessed mids, they do not have to be as good as the PX200s (AFAIK this is where they shine), but I want some good highs. They can be a bit harsh and aggressive, it would not create a big deal. I will listen unamped btw. So my main picks are:

- MDR-XB500 (for about $60-80)

- ATH-M50 (For about $140)
- ATH-ES7 (for about $65, but I want full sized headphones)
- AKG K240 (for about $210)
- Grado SR80i (for about $150, a bit overpriced perhaps)
- AH D1100 (for €200, way too much for my budget but if it's a no brainer could perhaps get it)
 -HD 212 Pro DJ (for €70)

Again, this will be mainly for metal (Meshuggah, Symphony X, Megadeth, Nevermore, Bloodbath, Opeth etc.). Highs are more important than mids, but still I don't want metallic vocals.  Instrument separation and details should be good. So what do you recommend? Thanks.

PS I live in Turkey so many headphones will not be available for me to buy.
PPS I can play around with some equalization.

Hello? Anybody there?

Thanks for the answers! The main thing is I cannot find the 60is anywhere. I only have access to the 80is. Why are the 60is a better choice? Do they have something that the 80is don't or are the cans I found just too much overpriced and not worth the upgrades?

Some research told me that the XB500s bass was aimed more at dubstep/electronic while the M50 and the Grados have a more metal/rock oriented bass. Is this true? 

If this is an important change, I'll be getting a Fiio e5 soon. Will this have any impact on my choice? Still Grados recommended? 

Thanks for the replies. I however will probably be opting more likely for a closed pair, since I will most likely listen to my music in the service bus as well, with other people sleeping, and I'm not really sure if I can listen to the Grados without being sworn at. Although this will be a weird comparison comparing an IEM to a full sized headphone, how does the bass of the M50 compare to the Senn CX300-II? I found the bass of them to be sufficient and powerful. I can also presumably get the Beyer DT770 Pro for €187 and the HD 25 for about $180-190 but I doubt that the Fiio 5/6 plus my iphone will be able to drive them sufficiently. 

To wrap up, I'm left with the ATH-M50, the HD 25, the XB500 and if it's REALLY that overwhelmingly good the SR80i for the sake of home-only listening. 

I listen to heavy metal (Meshuggah, Opeth, Bloodbath, Symphony X are my favorites) and want a punchy, tight, heavy bass but not with the sacrifice of the other components. 
Will drive through the Fiio E5.
I want a fun and an aggressive headphone. Forward is good. 
 

I have NO access to ANY Ultrasone or Shure models if anyone was going to advise any.
I listen to a lot of classical music but my PX200-II can handle them pretty well so I want a big, bad heavy metal headphone.

And I have like a week to decide.