T-Racks was/is great...
But if you are going to pay for the software....
Ozone is a well respected Piece of Kit..
All in one Mastering Package , with Pro results.
[url="http://www.izotope.com/products/audio/ozone/"]http://www.izotope.com/products/audio/ozone/[/url]
There is also a downloadable PDF ,
With a Fantastic Insight in Mastering ,
Well worth a look.
But at the end of the day , you still need a pair of ears
Cant beat a well experianced engineer.
Garry