This might sound ridiculous, but my DAC is a $70 ZuperDAC which I am really happy with. Actually I'm so happy with it that I have two of them: one for my laptop, and one for my Samsung S5 phone. Yet in spite of my being very happy with the ZuperDAC (and thanks to you guys) I am lusting for a Mojo
The NH's sound awesome off of my Samsung S5 + Zuperdac, but amps do add something. So off of my laptop's ZuperDAC, I either have 3 portable amps to choose from: (1) the cheapo C&C BH amp; (2) Fiio E12 (version 1) amp; or (3) Cayin C5 amp.
I mostly listen to the C&C BH amp because it has a 60 hour battery life (I'm lazy and hate having to recharge). It also has a vodoo "SF" switch that seems to nicely open up the soundstage into a 3D landscape. But the NH's don't need that effect very much, so I really also love the NH's off of the E12 amp because the bass turns into something amazing. I say E12 "version 1" because it was only produced for a short while and has a subtle yet extended sub-bass boost which really sounds awesome with the NH's (the blue line is the E12 version 1's bass boost FR);
The NH's off of the Cayin C5 sounds very good as well though, so I guess the point of my story is that the Nighthawks simply sound awesome... off of cheap or expensive gear - take your pick.
If I were you, I would sell some of those DACs/amps to fund Mojo. But that is just me.
Another vote for Mojo+NH here.