Slugbaby
This might come across as arrogant, but it's only my humble opinion...
I've always been a bad singer, so i spent over a year taking lessons. After that, I spent a few months recording an album (that's just about finished now). I was really looking forward to new tracks with soaring vocal feats. I wanted to sing with the same proficiency of my guitar (which i've played for over 2 decades and can do exactly what I'm attempting).
I loaded up a particular project, and was crushed at the sub-par singing that I'd worked so hard to achieve. Out of curiosity, I inserted AutoTune into the FX bin, and clicked a couple of buttons. Instantly the vocal track was perfect - this is what I'd been striving for!!!!
For a couple of seconds, I considered keeping this and calling the project 'done'. I actually slapped my hands on the desk and shouted 'NO'! lol
I quickly deleted the AutoTune instance, and uninstalled it completely from my pc. The devil nearly got me. I accepted that I'd have to re-record the vocal tracks.
I take pride in being a musician. I play what I record*. And if I can't play it, i'll learn and rehearse until I can. My vocal lessons have just finished, and i'm about to start piano lessons. To me (again, IMHO), I wouldn't be proud of something mechanically "fixed."
* i program MIDI drums, but that's mostly because I can't have a real kit in my apartment. With the room and soundproofing, i'd hire a session drummer.
Slugbaby,
Try these steps:
1. First, re-instal Autotune in your PC. It's not evil. Remember, guns don't kill people. People kill people.
2. Insert it in your FX Bin as you did previously. Tinker with it until your vocals sound good to your ears.
3. Re-sing all of your vocals except this time, use the Autotuned voxes as your guide. Take care to match your new takes to the AT'ed ones perfectly.
4. Remove the Autotuned vocals and you should be left with the kind of vocal performance you wanted in the first place.
5. Season to taste and you're good to go.
Personally, I'd just use the original with the AT on them. You said it sounded good to you when you tried it out. Ask yourself this; can I capture the same emotion and flavor that I loved so much on the original vocal? Be honest with yourself. If the answer is no then you're left with two choices;
a). Slap Autotune on that puppy and let that dog hunt!
or
b). Start a new batch of songs.
Remember, no one likes/buys a record because all of the notes are correct. People consume music because it makes them feel something. Make them feel what you're creating by any means necessary (within the law of course). What tools you use should not matter.
That's my two cents. Not that you asked for it. ...lol