I nearly cried when I first used Quark (6.0, I think that's the latest one) because I just couldn't make it do what I wanted. I really really hate Quark, and stay clear of it as much as possible.
I got comfortable with InDesign the second I first used it (after using PageMaker, *shudder*), but that has a lot to do with the fact that I just seem to understand Adobe apps.
I recommend you purchase InDesign, it's by far the best layout app. available and will soon be used more than Quark in the industry. It's especially useful if you're also using Illustrator and Photoshop, as you can bring in native PSD and AI files into InDesign and play with layer styles and everything right there in your layout.