1. downloading individuals songs from limewire, then putting them on a disc. Or 2. downloading a torrent of the whole cd ??
Buying the original (heh heh). When you get a MP3 file you either get a CBR or a VBR MP3 file. The WAV file can be up to about 1500 kbps, but the MP3 compression is good (so using some good MP3s, you can make a rather good disc). The MP3 files are usually wither 96, 128, 160 or 192 kbps. Obviously, the greater is the better (even if 128 kbps can be anough, for some simple music), and VBR (average=128) is obviusly better than CBR 128 kbps. Excellent MP3s are the ones made by ripping an original Audio CD with Exact Audio Copy [ http://www.exactaudiocpy.de ] EAC extracts audio files making an error correction, and compresses WAV -> MP3 VBR files which use a bitrate depending on the audio fike type (EAC is very slow, though...). Limeware and Torrent are 'ways to share', not 'rippers' or 'MP3 compressors'. Some people can share rubbish (WMA files) or very beautiful things (MP3 VBR files made by EAC). It depends only on what people did..... If some people put an uncompressed audio CD to share (blame to them! it's illegal!), it can be a good CD, if the audio CD put on the net was a rip from an original CD. But if it was a rip from a CD made 'at home' by burning some 96 kbps MP3 it's trash (huge, but trash).
The best way to create a 'Quality' .mp3 library is to do it yourself. Reason bieng most 'music' upped onto p2p networks, Is of varying quality.(Most that you will fine is terrible at best.) The best reproductions are using EAC (as stated already). Or FLAC (which is cumbersome and not mult-platform oriented). If you can findthem great but only if you own the original. Otherwise that would be piracy and is not condoned here.