Hi Ronrags,
I had the Rega for a week in my system courtesy of my very local kind B&M store.
It sounded great, to my ears it made music. Really easy sound nothing objectionable and it was a step in the direction I wanted to go from using the Havana unit (which I also enjoyed and had for over a year).
I would have happily purchased the Rega though I waited for the DAC2 to come in to the store for comparison and wanted to at least try it out to see if I would prefer it.
We compared both the Rega and DAC2 (in store) with a few other interested shoppers and everyone agreed the DAC2 was better for their own reasons; for me it was that the DAC2 provided more detail and bass authority without getting edgy at all. Just what I wanted in my system.
So that was it for me and it was confirmed in my own system at home later in the day, and I have no regrets.
I don't think you can make a bad decision here, both are great units and both made a significant upgrade in my system.