The onboard sound from this Gigabyte motherboard is good enough to play classical music through my hi fi system without wincing. It is not as good as my $500 CD player, but it is good enough to enjoy the music.
The 7.1 sound card that I bought for $35 for my old PC was OK as well
My advice is, don't buy an expensive soundcard unless your speakers and amp cost as much as your PC!!