With the music you listen to, your the best bet in this price range is the V-MODA Crossfade LP2 - or original LPs if you want to save $80 since there isn't really that much of a difference. I just got a pair and dubstep is really where they shine. They have much more of an "impact" than the M-80s, the bass is elevated slightly (about half as much as Beats), but it doesn't interfere with the rest of the spectrum after a good 9 hours of pink noise burn-in; I can listen to Skrillex, Taylor Swift, and Pat Benatar in the same playlist and not feel like I'm missing anything in any of them. The M-80s, being more balanced are better suited for jazz, soft rock, or classical - really only big sounding classical, softer compositions are not treated well - for electronica or dubstep the LP2s are much better suited.
Also they - being fully circumaural - are more comfortable than the M-80s IMAO and isolate slightly better, although because the aluminum body transmits sound more than plastic, they don't isolate as well as similarly priced closed cans. As far as portability they are light enough, and clap just strongly enough that they can be worn while walking around without being uncomfortable; and my Sony Walkman S-series can drive them fairly easily.
Just to be more specific, if you are not familiar with the Sony Walkman NWZ-S764, it has almost identical internal components to the last iPod Nano generation before the touchscreen one (minus the camera). It has a maximum volume setting of 30, and I usually listen between 12 and 15 in a quiet room, or up to 17 on a bus, at 20 it is uncomfortably loud in almost any setting. At home I listen through my Creative SoundBlaster Go! Pro and amped by my Sony desktop stereo receiver and it is better, but only noticeable with a side by side comparison.
Edited by MikeF93 - 9/19/13 at 7:56am