There are lots of choices but I'm going to throw Hifiman HE-400 out there. They are killer for rock -- the sound is extremely fast and precise, with lots of weight but no bloat. Guitars have serious crunch and aggression out of them, drums and cymbals sound very alive. They are strong in the bass, but it's an extremely clean, accurate, precise bass. Tons of depth and slam, but it does not exaggerate the bass. An amp would be ideal for them, but I was shocked at how good they sound unamped. They are very sensitive. I'd listen to them unamped for a while, then get an amp once you feel the need.
Another choice is Grado. I have the HE-400 and haven't heard Grados, but they are commonly recommended for rock. They have a very large following and shouldn't need an amp. SR225 is considered the sweet spot of the line.