Kite7, I have found the Monster Turbines to have a very similar sound signature to Grados. Very surprising, but also very enjoyable (the Turbines reproduce distorted guitar just like the Grados).
Not what I was expecting, but now I have an option for the Grado sound in an IEM.
I enjoy the SE530s, especially after switching to the more comfortable black olives from the yellow foamies, but the Shure's signature mid-range doesn't always work with my broad music selection. Still excellent IEMs, and very comfortable.