I just caved in and bought a HE-500, and am super stoked for it to arrive in the mail. Upgrading from an ATH-AD900x /FiiO E17 dacamp. I was looking around for possible amping for my new cans to do them justice. So far I have seen many recommendations for the Emotiva a-100 Mini-X but one of the caveats is the background noise it apparently produces, which might be somewhat bothersome. I am also looking at possibly a magni/modi combo. My price range is $200 max as of now. Any input/suggestions? Thanks!