alright well heres my unsugarcoated but true advice...
skullcandys-SUCK. thats all there is to it, sure they might look cool, but the audio is pathetic, and then they break in like less than a month. Trust me, i must have gone through atleast 15 pairs of them before i really started reaserching headphones.
I also have beats by dre- theyre ok, but not worth their price at all. the bass is good, and same with the sound quaility, and theyre probably the most comfortable heaphones ive ever worn, but there just simply not worth $400, especially with how easily the top bad breaks. If you dont mind sinking the cash into them tho, youll enjoy them tho, they also have pretty good noise cancelation on them
if your just looking for a rediculous amount of bass, then get these two things together
the second link there is a portable external headphone amplifier. For anyone that wants bass, like as in twin 15" car sub bass, then this is what you need.
those sonys unamplified already are pretty bassy since they have some of the largest drivers you can get in headphones, but with that amp plugged in too, theyll be fuckin bumpin for sure. Itll also improve sound quality too along with volume.