Board Thread:Off-Topic Discussion/@comment-2041593-20130928224851/@comment-186.54.185.97-20131115024339

I don't like Luka, but wen she sings with Len they can sound pretty good; also Rin and Gakupo duets, as well as Meiko x Gakupo duets, Rin x Gumi duets also have proven to be good together; Kaito x VY2 as well as Piko (manly Piko) x VY2, or even Yohioloid x VY2 (VY2 is great); and then, of course: Zola project, any of them, especially if WIL is included.

I prefer many Vocaloids over some of them, but I haven't listened or found any other cool duets by other pairings that I remember right now.