The Grado house sound is dry, sparkly, splashy, aggressive, peaky, tight-bassed, forward, in-your-face, upfront, eargasmic, mids-centric, immediate, fatigue-inducing, and in a nutshell, poisonous.
They perform best with genres that focus on instruments that belong to the upper midrange frequencies, such as the guitar, violin, voice, etc. These translate to most forms of rock, acoustic, and vocal pop or soul.
You can try their super entry level model, the iGrado, or their regular entry level model, the SR60i.
Where are you located? We can try to set up a small meet for you so you can listen to these fine Brooklyn Ear Busters.

those are the new versions which are available. the old ones do not have that "i". they say it's an improved version, but I don't think there is really much of a difference. 
Agree. Aside from the thicker cables and larger cup design, it's a small improvement.