My first thought was that Swinsian already covers what jmc seems to be trying to do. Great audio player. However I'm quite surprised to see your iTunes handle

My first thought was that Swinsian already covers what jmc seems to be trying to do. Great audio player. However I'm quite surprised to see your iTunes handle such a library decently. Mine is struggling with 300 GB, however my iMac is aging so that may be the issue.