http://www.linnrecords.com/Their catalog is limited; basically just classical, jazz, and some 'world' music. But they care deeply about sound quality and offer many of their albums in super-high quality "Studio Master" 24-bit, 96khz+ (up to 192khz) FLAC or WMA files. That's
better than what you get from a CD. It's basically SACD quality.
Be warned though, the "Studio Master" FLAC albums are enormous, > 1GB per album. And a little pricey, ~$24. But if you want to test the upper limit of what's available via downloaded music, that'd be the way to go.
