a group i've been listening to for a while now and find that they're extraordinary is Madredeus:http://en.wikipedia.org/wiki/Madredeus
try this one (O Paraiso) on YouTube to get an idea if you never heard them:http://www.youtube.com/watch?v=cPnAXCrQY2o&feature=related
if anyone wants to listen to their "best", you should get their album titled "Antologia".
for best sound, it should be played with Dolby PLIIx Music at around room filling volume. you'll bathe in voluptuous sound when you've found the right vol. level.
the recording engineer has done an excellent job on this.