I am currently using a set of Grado SR325e with my SN2 headphone output. I really like the sound, and the SN2 HP output has plenty of power for the 325.
I am looking at going up the Grado line. Possibly the GS1000e, GS2000e or GS3000e.
I was wondering if anyone was using higher level Grados with the headphone output on a Naim integrated (SN2, SN3, XS2, XS3, etc). If so, how do you like it?