Why not just run them out of the iPod?
ATs generally do well even without external amping, and even though I've been lugging around ESW9/10 for a few years with a Pico + iPod rig, I'm starting to think that the extra size just isn't worth whatever you gain.
Especially if you're using it in noisy environments, where the increased SQ is less perceivable, making it even less worthwhile.
I'd say save yourself the trouble and the money and keep it simple and small.
Just another view that you might want to keep in mind.