I am new to headfi, actually looking for something I can use in the office.

I did google around and found only x3 and x5 are player, while other models are just amp or dac/amp that require computer as source. IMO, using computer as source might not be good idea because sometime computer will be very slow as doing office works, which might disturb the music playback smoothness.

Thus I am looking forward to dedicated player to make thing simple. And here is some questions on the X3 and X5;

(1) Are they sure better than my Samsung Note II or Note III as music player to headphone? I know it is stupid question, but actually the most important. If not much different, no point right?
(2) Since the X3 and X5 never mention about the headphone impedance supported, how's the performance as compare to the amp? Example E07K? Or I should get those E07K and use hand phone as source?
(3) With X3 and X5, can I assume better to get Audio Technical ES7 (32 ohm) or EW9a (42 ohm) rather than Audio Technical HD600 or HD700?
(4) Where can I test them? You know any shop? Prefer shopping mall if possible...

Hope some people can take some time to explain to newbies...

Any idea where can test the X3? Just want to know if like the sound. Any shop?

Can X3 drive Senheiser HD600?