Take a PC, use emacs, write in LaTeX. The learning curve is steep, but you get a high-quality layout. For anything larger than an article, "Word" - or leave alone AmiWrite or WordWorth is not exactly suitable.
I once set a book in Amigawriter for printing. Worked pretty nicely and was designed quite well. Unfortunately the program is a bit unstable. I don't use it any more, but I did quite some work with it (beside the book a few university protocols). But rule #1 save, save and save your work - it can crash any time.
If I use a word processor on AMiga these days it's Wordworth, but usually I don't do that, but use other systems for word processing (Win or OS X with OOo, Word or InDesign)
And for MS Word: I cannot understand the badmouthing of Word. Current Word is very capable for highly complex documents. Still I prefer InDesign for setting a document, but Word is definitely a very mature and powerful word processor.
