I've been working out with Cathe on Fit TV for a couple of weeks now and have finally felt like I am getting an excellent workout that actually takes me to the next level. I want to purchase a DVD that I can work out to when the her workout is not available on Fit TV. I would like to have something that does a complete overall body workout - upper body, core and lower body combined. Which DVD (DVDs) would be a good fit for this?