FiiO e9 vs O2 for amplifier when using E17 as DAC

[unleash]

Hi guys! I am new here and have just been initiated in the world of high end audio by my friends. I currently own ATH M50 and am using E17 as my DAC/amp from my desktop. I wanted to see if anybody can advice regarding what would be better as a dedicated amp for the E17. Should I go with the E 9 or JD labs O2. I know the M50s dont require a dedicated amp but this is looking into the future when I might have more demanding cans.

Thanks.

 

[MrEleventy]

I'm using e17 + o2 combo currently. With the l7 adapter. I'm definitely enjoying it. Running my newly acquired dt880/600. powers it nicely

 

[disastermouse]

Have you considered the Schiit Magni? I don't know what it'll do for M50s, but I think it's a better amp than the E9 or O2 (I own all three).