Thanks for the input @audioman58
The Innuos Pulse Mini has an on-board DAC, the Pulse and Pulsar do not. I had thought I could leverage the DAC in the mini with the digital output of the NUC, but it cannot do this. To go the Innuos route I would need to keep an external DAC in the picture.
The Vega that I have on loan is old, released in 2013 I believe, this one - AURALIC VEGA (stereotimes.com)
But sounds great to my ears and would be equivalent of just over USD600. This should give an idea of the options and costs over here.
As with everything so far, it seems committing more budget than I am comfortable with is the best (and certainly easiest) solution...