Just bought an album download from Amazon.com (MP3, no DRM, and 256 Kbps) called "The Priests". Very beautiful and moving. From what I can tell from their web site, they're three Catholic priests from Ireland who are also tenors.
Being a geek, I keep the MP3 files in iTunes and stream them to the powered speakers in another room using AirTunes. 802.11g appears to be have plenty of bandwidth because the result is truly stop-in-the-middle-of-what-you're-doing-to-listen beautiful!