I'd get the DVD. I've said this a lot about CTX: it's the most versatile series Cathe has ever produced. There is nothing like it on the market. You can use every workout in a 6-day rotation, or you can mix and match however you want. When I was new to this forum, I read a lot of success stories from ladies who used CTX alone.
As far as eating goes, I agree with what Clare says. There have been a lot of threads here about clean eating, and there are a lot of books out there about how to eat for fat loss, not just weight loss. Also, there is no one magic formula to working out or eating to get the results you want, as we all respond differently to diet and exercise.
Pinky