I just bought a Black Ice tube DAC on sale (direct from Black Ice) for $899. They offer a 45 day no risk trial. My initial impression of the DAC and the company is very good. As others have said, you need a streamer and the Node has been suggested which is what I have. I have no clue about the ROON side of the equation.
Someone suggested ditching Tidal - I'm a Tidal user (basic service I do not have MQA) and have been a/b testing Qobuz over the last 2 months to see what the fuss was all about - and so far I have zero reason to switch purely based on sound quality. Today Qobuz started playing songs from a few seconds into the track and then skipping to the next song. Happened multiple times with different albums. Never happened with Tidal. But why not get a free month and see for yourself?