I lean toward the iDevices. They can be had used pretty cheap, the interface is very familiar to me, the on board amps are so crappy that they don't take up too much space, so the devices themselves are pretty small. All in all, a fine transport for the iDevice version. If you can't stomach the big Apple though, well, I get it. They P me O often enough as well. And yet I remain a fanboy. Weird.
Well, I kinda like the looks of the black Classic, so if push comes to shove I might go with that. Not sure if 24/96 is supported with classic but then I'd just leave any hi-res stuff for my laptop.
And hope some decent OTG source comes sooner or later.