Good points, thanks. Some promising signs:Yep, the question is always how it behaves under linux and what it is capable of. I would invest some time trying to find out some info in the internet or buying from a shop that you can return it easily if it doesn't work.
Website of Nathalie Beimler. Review of the ESI U24 XL USB sound card.
But yeah the proof of the pudding etc. etc…