Santa was kind enough to bring my daughter Karaoke Revolution, and we've been having a ball with it. But, the microphone looks like it belongs to a 70's cassette recorder. (It's the same style as the Mario Party mics, just black.)
I saw that Konami made a pretty nice looking mic for the PS2, but after Googling the crap out of it I couldn't come up with anything else for the Gamecube.
I read that review and that line stuck out for me too. Smackdown vs. Raw 2006 may have a bigger roster, but look at the list of guys who are in SDvRaw2006 and not DoR2; apart from Lita, they just make the game seem more dated: