Predator as well.
Also see my thoughts here, but be sure to read through the end as I answer questions over time: http://www.head-fi.org/forums/f105/m...-micro-306883/
To me, most of my headphones sound better with the Predator than with the Pico (HD600, Grado RS-1 and HF-1, Edition 9, AKG240M, Yamaha HP-1, Proline 2500, Livewires, Denon C700, etc). A few sound better with the Pico like the Denon D2000 and Freq Show. None sound bad with the Predator, but the Ultrasone Proline 2500 sound cold and distant with the Pico. Still, it is maybe only 5 or 10 percentage points that separate the Pico from the Predator, and the Pico can throw a wider more expansive soundstage.