Audio Editor For Mac Options

[Podfather]

I'm wondering if anyone can recommend an audio editor for the Mac. I know Bias Peak is the standard program to use but I'll explain what I need :-

I use Logic Pro 7.1 and have Waves plugins etc

Bascially I am remixing the album of a heavy rock band and want to do chilled mixes. I have all the .wav files (24 per song) and want to chop up the vocal lines and then maybe slow them down and change the pitch etc.
SO the audio editor would need to do

.wav file chopping
pitch correction (if possible)
maybe some funky vocoder effects although I can do these in Logic if needed.

I assume most people will recommend Bias Peak so should I go for the Pro version or will hte LE version suffice?

Ive tried lloking up this info on their website but it appears to concentrate more on the mastering/CD dupliction side of the program.