The Klipsch bass was good and detailed, as much due to the excellent fit from the tips as the (probably) higher quality driver, but I was using that pair while using my old HDD Zune 120, which doesn't have an EQ. The bass was never so much that it made songs unlistenable (or even bad, for that matter), but I had to be careful what I chose to put on for homework music because fatigue would eventually kick in after an hour or two. Clarity did tend to take a hit with any guitar-riff laden music though. Nothing drastic, but certainly noticeable in the mid-bass region, though some of that could be due to some less-than-optimal bit rates.
Essentially, the bass is definitely good and definitely there, but don't assume that it's only going to be noticeable in the songs you expect to feel a kick in. You may need to mess with an EQ for a bit, but then again, half the fun comes from doing that anyway...
As far as dubstep and hip-hop go (referring back to the original post) I think these would work flawlessly