I would tend to recommend away from D&D and d+M to start off with for two main reasons...
1) The majority of flourishing releases are so heavily two-handed cut based that it's easy to get grounded in it as the only style of flourishing. I'm certainly not a HL person, but I think a flourisher who is adept at different styles is capable of more than someone who starts and gets stuck in two handed cuts.
2) There are easier things out there. I don't agree with the "throw them into the deep end" reasoning here, because quite simply, a difficult flourish learned when starting out will take you a year to learn. A difficult flourish learned after a year or two of study will take you three to six months to learn. I know which I'd prefer.
Because of those reasons (feel free to disagree, they're my opinions only), I would rather recommend the Xtreme Beginnerz DVDs and especially Jerry Cestkowski's The Encyclopedia of Playing Card Flourishes. Personally, I think De'vo is a massive douchebag with a small you know what and epic insecurity issues (not to mention he wishes he had a more German name... Dave...), but as a performer, I can't fault him and I think there's truth in his approach to manipulation.