Best bass headset? Sony MDR-XB500 vs MDR-XB700 vs Skullcandy Skullcrushers

Okay, so atm I have the Razer headphones in my sig below...
they're really great just not enough bass for my liking, Ive always had a liking towards Sony headphones and I've narrowed my choices down to these two Sony headphones and Ive just been recommended the skullcandy headphones today and starting to like them as well and now I need help deciding.
I listen to a wide variety of music from RnB, rap, pop, classical, intrumental, a bit of everything except for like heavy rock or heavy metal but more hip hop and dubstep type of music.Im also considering MDR-V700DJ due to being closed ear and allowing less sound leakage out just hating that silverish colour

I know the skullcandy headphones would be best choice due to the built in battery powered amp, but I was wondering how both of the sonys compare to it, as I was leaning more towards sony before esp due to they sofisticated look as well compared to skullcandy but that isnt really a problem.

just a few things to let you guys know, I was going for the Sony as i heard really good things about these headphones specifically, since Ill be listening to classical and intrumental music as well, I would like good mids and treble if not great, which I know the skullcandy's are fairly okay in that region but nothing to jump up and down about so i want fair views on the sony before i head for the skullcandy's.
Im also looking for comfort and portability, I was be able to just throw them in my bag without worrying about them getting ruined or messed up, but not mandatory, I can keep them seperate if needed

and for those audiophiles who want the tech specs here you go.
MDR-XB500

Dynamic Type:YES
Closed Type:YES
Capacity (W):1.5
Driver unit (mm)40
Diaphragm:PET
Frequency (Hz):4 - 24,000
Sensitivity (dB/mW)104
Magnet: Neodymium
Impedance (Ohm): 40
Earpads:Luxury soft touch
Wearing style:Circum aural
Cord type: TPC both sided
Cord length (m)1.2
Plug
L shaped stereo mini plug (Gold)
Weight (g)
Approx.
185 (without Cord)



MDR XB-700

Dynamic Type: YES
Closed Type:YES
Capacity (W):3
Driver unit (mm):50
Diaphragm:PET
Frequency (Hz): 3 - 28,000
Sensitivity (dB/mW): 106
Magnet
Neodymium (360kJ/m