A proper preamp is crucial to creating a realistic soundstage.
Most Dac's with volume controls regulate volume by truncating bits which loses resolution and clarity.
For those dacs that do analog volume regulation, 9 times out of 10 the volume control circuitry and implementation of the output stage will not be close to a real high end preamp.
You can buy an outstanding dac which can easily compete with the Briscati for $3,500.00 the Auralic Vega which we have tested vs most of the $7k-10k dacs, and the Vega stands neck and neck with most of them, and then put the money into a really good line stage.
The Vac gear is excellent I would also take a look at the latest CJ gear which is also fantastic sounding.