I use a Neutron app as main application.(It too drain batt T_T)
When I want to change/pause/play track, I have to change it by touch operation.
But ZX1 has Hardward buttons so I don't need to turn screen on for changing track every time ^_^.
BlueTooth function is also great sounds.
Better than my previous Z and Samsung Note II.
sweet rig !..i recognize the zx1 and the 334, but thats about all I know. You mind sharing details of the rest of the rig?