DAC suggestion Please


Have the big "rig" upstairs all good
home office, out of PC to a Parasound Zdac into KRK Rokit 5 active speakers.
the Zdac was around 450.  if i was to double the budget to around 1k
what DAC should i go with into these rokit 5 or rokit6 if i upgrade
thanks much

mlapenta
Thanks for assistance.
End Result
i bought a Chord Qutest for my "big" rig

I upgraded the speakers on my "desk rig" to Fluid Fx8 and am moving the Chord 2Qute to desk.  
Former ZDAC v1 user here. Spring for a used NAD M51 for your price range. Should be able to pick one up for around $750 shipped. You will not be disappointed.