Usually, when no driver is needed for Windows, it'll work out of the box for Linux.
The vdac is a bit more than I wanted to spend especially since it does not have an amp.
The schiit modi doesn't have an amp. On the picture from the schiit's website, it's shown with the $99 magni
. You'll have a $200 DAC + amp. Maybe you can check for others combo (or separated) stuffs in this price range.
From my search before I bought my HUD-mx2 you have :
- Matrix Cube
- Yulong u100
- Audinst HUD-mx1
- Audinst HUD-mx2 (I recommended it
- Audinst mini
You should check their and even ask on Head-fi.org for some advices from more qualified people.