No, not really. I usually have it next to me or in my hands. For sure, the AK120 is more pocketable but I don't want to run it unamped because of the output impedance. Also, ak240 is coming but who wants to keep a 2000$ DAP in their pocket while they're walking around in the city. Most of the DAP's at the moment aren't very pocket friendly. I bought my DAP's and IEM'S because I want to listen to music when I rest or just hang around and chill. SE5 are the perfect partner IMO. I mean if you take a ride on the bicycle, I don't want to wear my customs meanwhile.
AK120's output impedance is not a problem with SE5way, SE5way is impedance is 135, it is not effected by AK120's output impedance.
ZX1 seems like a nice option, costs less than AK120, gives nice sound and very pocketable.