The JVC FX750 + Sony A15 + Fiio E11k + Fiio Walkman LO connect = the crispest, clearest, deepest, most 3D fluid musical experience I've ever had.
It's made me box up everything else I own for now. This includes the X3. The A15 has better interface, folder access, EQ, and sound, and portability. When you combine the amp and LO, it takes the music to this level of fluidity, sonics, and detailed imaging that makes it impossible to listen to the Sansa, iPhone, X3, or X02. Surprisingly the next best is my Sony 475. So this is now my main on the go set up for the foreseeable future (ok I'll still be looking for that magic new IEM lol), and the rest, aside from the iPhone, are getting boxed and shelved.