I suggest external cards, anything in RME Fireface series.
I myself on UCX, 1st generation - it’s best money i’ve ever spend, it sounds twice as great for what you pay for.
There’s few caveats:
To get it work on Linux you will need to enter hardware in CC mode, so all the fancy software mixer stuff for Windows / Mac won’t work
To get around it - you should just use jack2, which is better anyway.