Yes, generally for albums or if you want a specific song from that album in the highest possible quality you're going to be torrenting. MP3 sites and/or converters don't cut it for music. Torrenting is also useful for E-books and movies.
Newsgroups I know but how do I know I'm getting my money's worth when using them
I paid $50 for a tb of download. On a good connection I can download at 20 megs a second.
Also if you encrypt the connection with SSL its pretty much impossible for your ISP to actually know what you are downloading which makes it safer as far as copywrite laws go.