Which Pitch Correction is Best ?

[wolfman_rob]

I was thinking of getting some Pitch Correction . Thought it might make getting Vocal Tracks A Little Easier and More Perfect.

What is the Best one for Vocals or maybe even using on instruments even.

I was looking at

Auto Tune Also What Version 4 or 5 or something else

Waves Tune

Melodyne

Serrato Pitch N Time wasnt for sure if this was Pitch Correction or just Pitch Shifting.

Bias Pitchcraft Also the Whole Bias Bias Master Perfection Suite Audio Plug-in Collection and can i even use this efficiently on my HD system

or is there any others that might be a Possibility

Thanks,
Russell