Bitrate of MP3s

Zeropaid: An interesting question, thought I’d open it up for debate: I was wondering if someone could define CD-Quality in terms of bitrate. I heard 128 KBps was just under that, but is still good. I heard that 160 and 192 are better, but anything higher is getting larger in terms of size on the Hard Drive, and some things get distorted. What is the best bitrate to look for? Also I was wondering what the best application to use to download songs that have a consistant number of MP3s with a bitrate over 128 KBps, especially with regards to having songs that rare. I love Morpheus, but it does not let me download any MP3s over 128 KBps in bitrate.