Welcome, thats always a good thing that you dont need to write em, bit of a stressful ordeal =).
I cant tell you about the micro with each of those phones, I'm not sure whether or not the raw power is there. I dont want to disuade you, because I feel the sound I get out of it with both my 701s and the 530s to be well worth what I paid, and the flexibility to carry it with me, but for the price there "may" be another amp out there, though I cannot comment on whether there will be another amp that is that small and durable. The size really is quite surprising when you open up that white crate, its like hmm thats it?
It would definately get my rec for dorm life, accidents happen, and it is a solid product, Thats why I'm keeping mine, for the dorm, whilst my millet will stay home.
Dave