Definitely. I am listening now to iPod Classic -> PURE Dock -> cMoy -> Beyerdynamic DT770 Pro. The cMoy adds a bit more clarity and punch to the sound since the amp can push a bit more than say the iPod. You can also get a bit more favourable result adding an 12V/18V DC power source adapter to the amp for more power.
The form factor is ok, and takes up little space which is nice although having the line-in input on the front isn't as nice as if it was on the back. But not a big deal.
You can get a variety on eBay (or build your own). The ones on eBay can be as cheap as $35 but you will find you lose the power jack and the smart headphone jack ( on JDS Labs if you unplug the headphone it powers off).