Google Nexus 5 + FiiO E18 or FiiO E12?

[bldmovs]

Thank you for the reply and to tell you the truth that makes my day.  I can't wait to pull the trigger on one of these.  I'm hoping to use it in a car stereo setup.  No head unit, just the Fiio E18 and an AudioControl Three.2 using my Nexus 5 as a source.
 
Thanks again @rustablad I really appreciate it.  
 
p.s.  Just to make sure - I don't need a custom ROM on my Nexus 5 and I should be able to use the E18 with Google Play Music correct?  One other question, can I use a standard USB extention to increase the length from my Nexus 5 and the E18?  I am wanting to mount the E18 in the dash area (within 4-5 feet of the phone).  Or do I need to use the short, supplied cable that comes with the E18?

 

[joeike]

I am using the fiio E18 with my Nexus 5 and I think it works really good and improves the sound and I also use it with my HP computer at home and it does even better job with that also. I use the Audio Technica im70 or my AKG 553.