Created a "special" variant of input from its website,
http://input.fontbureau.com, downloaded and installed it. Now testing
it as the xterm font.
The font is a bit denser horizontally than Deja Vu Sans, which is my
only complaint with the latter. Input does support the powerline icons,
and so far it appears that everything works fine.
! XTerm customizations
xterm*utf8: 1
xterm*termName: xterm-256color
-xterm*faceName: Deja Vu Sans Mono for Powerline:size=9
+xterm*faceName: Input:size=9
+!xterm*faceName: Deja Vu Sans Mono for Powerline:size=9
!xterm*faceName: DejaVuSansMono:size=9:antialias=false
!xterm*font: -*-terminus-medium-*-*-*-18-*-*-*-*-*-iso10646-*
!xterm*faceName: Inconsolata:size=11:antialias=false