First of all i highly recommend downloading free trials. I've eliminated waves from my wishlist, was about to drop a couple grand on the waves bundle and when i downloaded it i didn't like it. Have you downloaded the new eq3 from digi yet, IMO its better than waves eq. As far as autotune check out antares autotune i think its about 300 bucks but its worth it.

don't waste your money on autotune, it sounds terrible. if you HAVE to get a pitch/tuning plugin get Melodyne by Celemony, it's so much better and has amazing features built in, like being able to match a vocal to a midi line. http://www.celemony.com/melodyne/

autotune can sound terrible for people who can't sing, and then pretty much anything you use will sound terrible. for me though i'm almost spot on most of the time and the autotune sounds wonderful. like i said you can download a trial of it and try it.