Besides the obvious Sound Choice, and Chartbuster. A lot of my singers like the Karaoke Bay versions which according to the posts is the only company which has paid the royalty fees ect to reproduce songs as Karaoke versions,and can be bought at the local Wal-mart when I go grocery shopping
. Zoom and Radio Starz also sound good. All of these are easily imported to hoster I have had trouble with Sound Choice and Chartbuster not importing in the past. Some fairly good inexpensive song packs include The Karaoke Party Packs sold by Karaoke.Com made by nutech and Song Factory 38special both will play well enough to get you started and have a good variety of new and old. I hope this helps
John