Ian, I work at a print shop where we do everything from business cards to four-color 36-page brochures in Draw. Attempting that with Illustrator would be madness. If you're planning to use Illustrator with PhotoShop and InDesign then you'll be alright, but you can start planning on three expensive and unreliable upgrades a year instead of one.

I've said it before and I'll say it again: Some people like Illustrator for the exact same reason that they like the Macintosh's one-button mouse: it does LESS... and some people find that comforting.

(Did anyone say, George W. Bush?)