I am not sure what is to be gained upgrading a V-DAC with a sub $500 dac given a squeezebox touch as a source. Nothing against the touch, just that I have never listened to one. That said you might check into the Schiit Bitfrost dac, providing the touch outputs on coax you could get the non-USB version with the Uber analog upgrade. The USB input can be easily added later if that need arises. Though I have not owned one there are many on this forum that seem to enjoy theirs.
Moving up from the VDAC
decided now with tidal and a sudden influx of some dough i'd step my dac link in my audio chain. i'm not into spending crazy money on this $500 would be my top out. anyone have any suggestions? i listen to a lot of jazz, rock, funk, and electronic music. my current system is a squeezebox touch into the vdac into a decware zen torii mk iv feeding a pair of zu audio omens.