Conclusion. Next time try either one, an H4n pro or an H6 (or Podcast P4 maybe). Size is similar and they all do minimum of simultaneously recording one stereo in to two tracks and one mono in to a third track. They also have line outs so you could probably resample (add effects).

h6 is bigger, but it has 6 tracks. Only, do you need a multitrack? Are you just going to use it with DAW and can you just use your BR80 instead?

h4n pro is smaller but still meets the requirements, but only 4 tracks not 6, so if you want to bounce?

BR80 downsides. No multitrack simultaneous. Cant resample from DAW ie external effects. But maybe can use H1n plus BR80 to resample.

There is also small interfaces, the Zoom AMS22 (22 has one jack plus one stereo line in but can't do both simultanously because they get partially mixed) and AMS24 (24 has two jacks plus stereo line in). Behringer also makes a similar small interface.