Depends on how critical you want to be. The current Color Corrector inside FCP is very powerful in itself. It can be tricky to manipulate.
It will be interesting to see what Apple does with Final Touch. I am looking forward to NAB this year.
Nattress, Digital Film Tools’ 55mm and Joe’s Filters are a few plug-ins to look at.
Steve Eisen
Eisen Video Productions
Director-At-Large
Chicago Final Cut Pro Users Group