I can recommend NOT getting a Focusrite Scarlett 2i2. It does not play well with Linux. It still can work but has issues.

I’m just curious, what type of issues are you running into with it? I purchased one a short time ago for recording guitar practice sessions for future reference. I haven’t used it an enormous amount yet, and I’d like to prepare myself if there’s use cases that don’t work on Linux.

I’m running Ubuntu Studio, and using a microphone or DI depending on the situation.

The biggest thing was sometimes all output coming out as a distorted clipping mess, with nothing fixing it but a reboot. It was random and I can’t tell why it happens. Other than that it’s a lot of more minor stuff like the configuration software being Windows exclusive.