I've spent the last year or so finishing of my thesis, and now it's good to be back (and at a real job!).
So, I'm thinking of using my iPhone 4S (and iPad 2) as my sources at work, mainly listening through a Grado RS1. I'd like to know what's available these days in terms of DAC/amp options that don't take up too much desk real-estate. I've been seeing things about Fiio E9s for iPhone; is that any good? That seems the kind of thing I'm looking for: something I can plug my iPhone into to give the RS1 a little more goodness. Are there better options?
Also, I have an iBasso D10. I could just get a LOD and put the D10 between my iDevices and the RS1, but that means my iPhone isn't charging, which is unideal. Thoughts?