I think Beats Studio actually sound ok, just not for the price you pay for them. If they were like $150 instead of $400, then they might be ok. I would give them an honest consideration. The Beats solo's on the other hand, SUCK. Sound is big bass and everything else is honestly terrible. The build quality is even be worse. I've broken two beats solo's at my local Best Buy just by trying to expand the headband. Aside from that, they just feel cheap and fragile. The looks aren't great imo either so that eliminates the last incentive to buy them for me.
And I'd rather donate $150 to the KKK than buy those JustBeats and wear them. Adding a Justin Bieber flavor on them puts the looks in the same level as the build quality.
As for this whole hip-hop debate, I've been a big hip-hop listener for the past 4 years and the Beats don't appeal to me at all except for the bass. Now I have also been in high-level concert bands and symphony orchestras throughout my life so maybe that's why I want good SQ along with that bass, but hip-hop without all that boomy bass certainly isn't bad. There are hip-hop songs that intentionally throw out tons of bass. I can think of a few Lil Wayne songs like that. But many great hip-hop songs don't have that and headphones that create all that non-existent bass destroys the accuracy of the song and is disrespectful to the developer and the artist who's song is getting destroyed. There are great headphones out there that can sound just as boomy as the Beats when needed, and yet give you good sounding mids and highs that the hip-hop artist intended for you to hear.