IMHO From my experience I think you would save more money in the long run if you skip the entry level portable amps and get something better, I highly highly recommend this because really the PA2v2 barely does anything at all, it's not suprsising at all, once you see the internals of the amp, there's only like 4-5 components (I used it for a month or so with my iPod line out, my friends H320, and for my computer), and portable amps in general don't do a whole lot either, well in comparison to desktop amps anyway.
I really don't know why people say this amp is a nice little amp, it's quite possible the fiio is the better amp as well, and that barely did anything either from when I heard it :x
However If you do choose to get the PA2v2, I'm not sure if Gary fixed this, but there used to be channel imbalance issue at lower volumes, so this may be a problem with iems, so you may need to get the gain adjusted, come to think of it I think he did add a gain switch of some sort in the past few revisions.
there is quite a high demand for these little amps, as they seem to be popular with first time amp buyers so selling the resale value shouldn't be a problem.
I know I sound like an Anti fan, but I'm just trying to steer you in the right direction.