These two stocks have long traded at a premium valuation, but now look like promising buys following recent share price drops.Some of my favorite purchases to make -- and most successful in hindsight -- have been adding to the steady dividend stocks in my portfolio on the dip.While there's always the risk of these dips turning into "falling knives," I believe the two stocks in this article have the qualities to thrive over decades.Here's the case for these magnificent dividend stocks and why I've been addin ...