supported sound cards

[Edward Terry <eterry@openboxbuilder.com>]

I'm starting a business selling Linux-based computers, and I'm looking 
for a high-end sound card that works well under Linux.  I don't have a 
specific use in mind; this would be for a wide range of end-users, from 
audiophiles to gamers.

Is there a particular high-end sound card that stands out as working 
well under Linux?  If not, what cards should I consider?

I appreciate any information or suggestions.

Edward