2. EHX Small Clone
The (un)holy grail of grunge chorus - if you want Kurt Cobain's chorus sound then this will get you some of the way there.
The Small Clone is beautifully simple - one knob, one toggle switch, one footswitch. It's one of the more subtle and tasteful choruses out there, with rich textures that don't leap too far out of the mix.
And as you can hear in the video above, it does that Prince thang incredibly well.