Oh that's nice! I am personally interested in the E18 because I am deciding should I stick with a separate mp3 player or go with my phone + E18 (or an Apex Glacier if I go all in XD)... The form factor is a deciding factor to me. Looking forward to try it out!
Might not be the best but definitely a very cheap and effective combo! Not only you get to try using Amps and Dacs, but you also get to upgrade separate components later in the stage (E6 might be the one to go first)!