Hi all! Recently I bought myself a Sony NW-A35 to play my lossless files on the go, and to replace my aging iPod Touch 4th gen which if I were to grade using Audiogon's scale, 4/10. The shop where I bought it from let me try out their headphones and hearing good things about Grado, I tried out...

I am thinking about getting a second pair of headphones (MS-1s or SR225s) to complement my HD600s. However, I was wondering if they will work well through either my soundcard or my headphone amp (see signature) ? I really don't want to buy another headphone amp. My reason for getting the...