If you color in FCP, I would suggest creating a look in REDAlert that you like, then try to finesse it in FCP with something like Colorista.
If you're going to use Color instead, bring the footage in pretty flat, because it will give Color more flexibility than if you clip the highlights or shadows with a look.
-Russ
Russell Lasson
Colorist/Digital Cinema Specialist
Color Mill
Salt Lake City, UT
http://www.colormill.net