If you like to tweek more yourself the Audison is a good tool but it would take hours to setup to be very good.
The JBL auto tune works imo quite well and its Andy Wehmeyer's baby who is imo extemely knowlegable guy about audio and tunning. Not to mension im sure Gary Biggs had an input to it too. (Google those two 
). Ive learned a few things from those two over the many years. The JBL is not as tweekable afterwards though as the audison.
Thanks Geoff. Most helpful.
