It is my feeling that for a cabinet which will be supporting weight you are better off using dados. Here is why I say this: We all know that the more glue surfaces you have in a joint the stronger it is. The dado has 3 while a pocket hole joint has one. In fairness the pocket hole joint does have the screw which acts as a powerful clamp on its own. So what happens when you introduce an impact to the joint? We have all seen screws pull out. The same impact applied to a dado joint will have the wood pushing down on a lip of wood with 3 times the glue to help support it. This just strikes me as a stronger joint. We all know how easy it is to drop something on a table. I guess in 50 years there will be enough data to give us proof one way or the other.
"Living in the D" (this means Detroit!)
"It's fine to disagree with other members as long as you respect their opinions"