Back in the day the best low cost DTP was Personal Press from Silicon Beach, later acquired by two or three others, and eventually swallowed by Aldus which had Page Maker. I eventually bought PM, but still liked the simplicity and power of PP.
I use Pages for quite few projects for page layout stuff, especially multi-page bulletins for worship. Because I am editor of our national church magazine I needed to share files with the layout editor, meaning Adobe InDesign was required. Four years ago I was able to purchased Adobe CS4 Adobe CS4 Premier Collection (Acrobat Pro, Bridge, Device Central, Dreamweaver, Drive, Fireworks, Flash, Illustrator, InDesign, Media Player, Photoshop) for less than $600. I use Acrobat Pro, Photoshop, and InDesign most. At that $200 for each, divided by four years is $50/year for the apps.
I also produce seminary and congregation teaching materials, which often include diagrams, drawings, etc. I find that if I do it in Illustrator then make PDF of it, I can effectively import into most programs. For my serious academic work I use Mellel (its support of Hebrew is superb, as well as auto titles, style sheets, etc.). For shorter projects I like Nisus Writer Pro. Neither is ideal for graphics support. And thus, I pull out Pages for special projects.
Generally you could say I am a DTP/word processing junky who can’t make up his mind.