There is another Jester/Codemaster program before Music 2000 called MUSIC, but I find 2000 to be the best, because the controls are easy, there is quite a good sample database and it's less buggy than MTVMG2/3000 (altough it still have some glitches and occasional crashes)
I voted 10 too
For the first PC version I would vote 2 though, because it crashes all the time and the controls are terrible.
For the second PC version (Music 2002 Club Eddition: Slinky) I would go 2. The controls are as bad as the first version, but it doesn't crash as often and the new added samples are uber awesome. However there seems to be more bugs...