Get the Brainwavz HM5. Compared to M50 people say they are neutral sounding which is good for recording. At $120 or less they are a steal and supposedly very comfortable.
The DT770 would be the other consideration and I know they are bassy and comfortable but other than that I can't be much help. Tons and tons of info on them if you do a simple search though.
As for the ATH-M50, which I own, they isolate well for public use, are built like a tank, and sound good with most all types of music. However their mids have been described as recessed and for rock music that is not really a good thing. Don't get me wrong rock sounds good on these but a headphone like the HM5 were the mids are not as recessed might be better for rock, as well as the neutral sound being good for recording.
Grado is highly recommended for rock music. Make sure to demo them before buying as their sound signature is either love or hate.