Don't overlook Ulysses, a very strong and elegant word processor specifically for "creative writers" using Macs. It enables one to organize source materials, notes, and drafts without leaving to the Finder, and it is designed to help the writer concentrate on his or her writing, without being distracted by formatting, styles, myriad buttons to push and options to choose. 30-day demo available from makers, in Germany: www.blue-tec.com/ulysses/
Unleashing the Writer: Jer's Novel Writer