Best Headphone DAC/Pre-Amp?


Hello,

I just purchased a pair of Audioquest Nighthawk Headphones and I will primarily connecting it to my iPad for movies/music. I am looking to go above and beyond for quality of sound and am looking to get suggestions of the best DAC/Pre-Amp that matches up well to the specs of the Nighthawk. Thanks!
brooklyn1207
@freediver 
 "What is your budget?Are you looking for the crystal clear SS sound or do you want a bit of tube glow?"

Thanks for the response! Looking for a crystal clear SS. No budget, looking for portable. Right now, I am looking at the Oppo HA-2.



I'm a HUGE fan of Oppo's DACS,truly world class IMO.At the price point of the HA-2 I don't think you can do better.Great choice.