The ones I tried were the Melody. They were given to me, so please don't ask where to buy them--I have no idea. I have not had them for years--so I can only comment that after a few months they seem to be holding up very well. The TDK pro showed wear after half a dozen plays and putting in and out of the jacket.
As to the Mitsui gold discs, I purchase those from [url-http://www.american-digital.com/prodsite/default.asp]American Digital.[/url]