Krutsch
Headphoneus Supremus
They just released a new DAC-R with overhauled USB input...
Yes... and I would be very surprised if Rega used the 5V power lead from the incoming USB connection for anything, except sense (i.e. detecting a hot USB connection). For that latter reason, you may not get away with using a 'data only' USB connection, but who knows what will happen in practice.