Well, after a nice hibernation, Head-fi is back!

I've ordered the Arietta, and I'm currently waiting for delivery. In the meantime, does anybody have experience with using the Arietta with an iPod line-out and Beyer DT-990 cans? It seems as though this amp is a bit power-light, and I'm just wondering how it will cope with a relatively low-level lineout and relatively high-impedance cans.
Any input would be much appreciate.