Please help - B&W Formation Duo

Hi, I would like to buy the B&W Formation Duo’s this weekend, but not sure what Roon really does and what I need to get the sound I hear these speakers are capable of. I haven’t kept up with my audio equipment since purchasing my McIntosh MX160. I use that with B&W 800s and an Auralic Vega and Airies.

Would like to use the Airies with the Formation Duo’s. Will I be able to add the Airies to connect wirelessly or will that not work?

I have a ton of Flac files on my iPhone and MacBook Pro. Do I stream from here and how will it sound?