Best Vocal VSTs for vocoding, pitch shifting.

[Psuper]

By 'best' I specifically mean a few things.

1: An option-supercharged amazing sounding vocoder.
2: A pitch shifter and formant that sounds as natural as can be done.

I have a few in mind, however I'd like some opinions on which ones you like/use that are worth learning, and work well with Reason.

Any input is greatly appreciated.

[demt]

maudio mauto pitch shifter is enourmass and all encompassing.just getting the hang of it myself .There again izotope vocal synth is a bit diffrent if you dont over wet it.

[ProfessaKaos]

For pitch and formant shifting of vocals I like the sound of SoundToys Little AlterBoy. Has a very nice sound about it.