Could it be that Millenium is made by Innova?
actually, from what i hear, millennium makes their own discs now. the disc molds were designed by dave d. at innova though
it's hard to say what a favorite manufacturer would be for me as i think all of the manufacturers have good and bad about them.
if i had to choose 1 manufacturer to throw exclusively, it would probably be innova because of the teebird and roc. however, as the innovations generally occur closely linked to one another over time, i am happy that there are several manufacturers to choose from.