So what's the recommend karaoke for Mac? I'd like to trial it at a few events with friends ie birthdays etc before considering if I should invest. Karaoke has always confused me.

I've got mics, speakers, laptop, hard drives, external monitors etc, effects units, compressors etc. So I guess I need something to play the files.

Bonus points of it's something where you can adjust the speed, colours maybe even insert some logos.