Share 'Thoughts on tuning software....'

I am in the market for tuning software. I need it for basic "tightening up" as well as the extreme "T-pain" style of vocal fx for Pop. I'm sure I would be happy with either Melodyne, AutoTune or Waves Tune. But, I would love to get some advice from some other users. I have checked out many if the "shoot outs" online and I haven't been able to come to a solid conclusion. I currently use Logic's…